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BMW Internal Engine Parts

Rebuilding your engine or giving your cylinder head an overhaul? Internal engine components covers parts that are located within the engine block and cylinder head. Examples include: timing chains and tensioners, rocker arms, rod bolts and studs, head bolts, valve springs, connecting rods, and more. These are Genuine BMW engine parts, performance upgrades, or approved aftermarket brands that have a long track record of reliability and quality.

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King - Corporate Logo
T#:598331
Part#: CR222SV
In Stock
$ 52.00 USD
Free Shipping on orders $49 and up
Introducing King Connecting Rod Bearings for BMW Engines: the ultimate solution for enhancing your engine's performance. Crafted with precision and expertise, King's bearings offer unmatched durability and reliability. Designed to meet the demands of high-performance driving, they provide the stability and support your engine needs. Elevate your BMW driving experience with King Bearings. King Rod Bearings for BMW Engines come in sets of 2 (2 Upper and 2 Lower Bearing Shells) Suitable for 2 Con-Rods. The Upper and Lower bearing shells are comprised of a lead-free, Silver-based tri-metal material designed for extreme load applications. Engineered with meticulous attention to detail, King bearings are designed to exact standards to ensure optimal fitment and compatibility with BMW engines. Experience improved smoother engine operation with King Bearings.
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Supertech - Corporate Logo
T#:641030
Part#: VS-VBM6-6CYLKT
In Stock
$ 27.99 USD
Free Shipping on orders $49 and up
Includes a full set of polyacrylic intake and viton exhaust valve stem seals! Looking to replace your valve stem seals due to leaks, cracks, splits, or even during an upgrade of your camshafts, valve springs, or valves? Supertech valve stem seals are the way to go! This cheap but effective seal replaces the stock BMW seals that are notoriously prone to issues due to heat cycles and chemicals which cause the seals to become weak and brittle. Supertech seals offer a significantly longer life span and are resistant to both heat and chemicals thanks to their use of Viton or Polyacrylic construction (dependant on valve type). That means less time in the garage and more time on the street or track! These seals are also great for anyone who is looking to upgrade to dual valve springs thanks to the seal's overall thinner outer diameter! Guide OD: 8.8mm/.347" Seal OD: 12.2mm/.480"
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King - Corporate Logo
T#:597151
Part#: CR222SV0.25
In Stock
$ 52.00 USD
Free Shipping on orders $49 and up

BMW N20 N52 N54 N55 Connecting Rod Bearing Set of 2 Pairs - 0.25mm Oversized provides an exceptional upgrade for enhancing engine performance and reliability. Crafted by King, these bearings are engineered to withstand the rigorous demands of high-performance driving.

  • Premium Quality Construction: Made from lead-free, silver-based tri-metal material, offering superior durability and load-bearing capabilities.
  • 0.25mm Oversized Design: Features an oversized specification to accommodate slight engine wear and ensure a precise fit for optimal performance.
  • Enhanced Engine Stability: Provides exceptional support and stability to the connecting rods, reducing wear and extending engine life.
  • Precision Engineering: Designed to meet exacting standards, ensuring perfect compatibility with BMW N20, N52, N54, and N55 engines.
  • Improved Engine Operation: Delivers smoother and more efficient engine performance, enhancing the overall driving experience.

Turner Motorsport's BMW N20 N52 N54 N55 Connecting Rod Bearing Set of 2 Pairs - 0.25mm Oversized is ideal for those seeking high-quality components to boost engine reliability and performance.

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King - Corporate Logo
T#:599337
Part#: MB7776SI
In Stock
$ 79.99 USD
Free Shipping
$ 79.99 USD
Free Shipping
Introducing King Main Bearings for BMW Engines: the ultimate solution for enhancing your engine's performance. Crafted with precision and expertise, King's bearings offer unmatched durability and reliability. Designed to meet the demands of high-performance driving, they provide the stability and support your engine needs. Elevate your BMW driving experience with King Bearings. Complete Set: King Main Bearings for BMW Engines come as a full set. Silicon-aluminum Bi-Metal Construction: Crafted from King's premium Silicon-aluminum bi-metal material offering exceptional strength, durability, and heat resistance. Precision Engineering: Engineered with meticulous attention to detail, our bearings are designed to exacting standards to ensure optimal fitment and compatibility with BMW engines. Enhanced Performance: Experience improved engine stability and smoother operation with King Bearings.
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King - Corporate Logo
T#:3929159
Part#: CR222SV0.5
In Stock at Vendor
$ 52.00

This product was last offered at the strikethrough price on
05-03-2026

$ 48.99 USD
Free Shipping on orders $49 and up
$ 48.99 USD
Free Shipping on orders $49 and up

BMW N20 N52 N54 N55 S55 Connecting Rod Bearing Set of 2 Pairs - 0.50mm Oversized is designed to elevate your engine’s performance and reliability. Developed with high-performance driving in mind, this connecting rod bearing set from Turner Motorsport offers superior durability and support. Each set includes 2 upper and 2 lower bearing shells, crafted from a lead-free, silver-based tri-metal material that is specifically engineered for extreme load applications. These bearings are meticulously designed to meet exact standards, ensuring optimal fitment and compatibility with your BMW engine, resulting in smoother and more reliable operation.

  • Enhanced Engine Performance: Provides superior support and stability for high-performance driving.
  • Durable Construction: Lead-free, silver-based tri-metal material designed for extreme loads.
  • Precise Fitment: Engineered to exact standards for compatibility with BMW N20, N52, N54, N55, and S55 engines.
  • Improved Reliability: Ensures smoother engine operation and reduced wear over time.
  • Complete Set: Includes 2 upper and 2 lower bearing shells for 2 connecting rods.
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King - Corporate Logo
T#:597154
Part#: MB7776SI0.25
In Stock at Vendor
$ 118.99

This product was last offered at the strikethrough price on
08-22-2026

$ 66.99 USD
Free Shipping
$ 66.99 USD
Free Shipping
Introducing King Main Bearings for BMW Engines: the ultimate solution for enhancing your engine's performance. Crafted with precision and expertise, King's bearings offer unmatched durability and reliability. Designed to meet the demands of high-performance driving, they provide the stability and support your engine needs. Elevate your BMW driving experience with King Bearings. Complete Set: King Main Bearings for BMW Engines come as a full set. Silicon-aluminum Bi-Metal Construction: Crafted from King's premium Silicon-aluminum bi-metal material offering exceptional strength, durability, and heat resistance. Precision Engineering: Engineered with meticulous attention to detail, our bearings are designed to exacting standards to ensure optimal fitment and compatibility with BMW engines. Enhanced Performance: Experience improved engine stability and smoother operation with King Bearings.
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Supertech - Corporate Logo
T#:302459
Part#: BMIVN-1030
Ships in 8 Business Days
$ 32.99 USD
Free Shipping on orders $49 and up
Supertech valves are some of the best on the market, made from one piece of forged stainless steel for the ultimate in strength and durability. Supertech valves go through a special heat treatment process that obtains the right amount of harness for each engine to ensure the ultimate valve for your performance motor. These valves are hardened black nitrided, which is most popular in European and Japanese motors.
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Supertech - Corporate Logo
T#:640219
Part#: BMEVN-1030S
Ships in 8 Business Days
$ 29.99 USD
Free Shipping on orders $49 and up
Supertech valves are some of the best on the market, made from one piece of forged stainless steel for the ultimate in strength and durability. Supertech valves go through a special heat treatment process that obtains the right amount of harness for each engine to ensure the ultimate valve for your performance motor. These valves are hardened black nitrided, which is most popular in European and Japanese motors.
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King - Corporate Logo
T#:4840521
Part#: CR222SV0.75
In Stock
$ 33.99

This product was last offered at the strikethrough price on
08-13-2026

$ 32.79 USD
Free Shipping on orders $49 and up
$ 32.79 USD
Free Shipping on orders $49 and up
Introducing King Connecting Rod Bearings for BMW Engines: the ultimate solution for enhancing your engine's performance. Crafted with precision and expertise, King's bearings offer unmatched durability and reliability. Designed to meet the demands of high-performance driving, they provide the stability and support your engine needs. Elevate your BMW driving experience with King Bearings. King Rod Bearings for BMW Engines come in sets of 2 (2 Upper and 2 Lower Bearing Shells) Suitable for 2 Con-Rods. The Upper and Lower bearing shells are comprised of a lead-free, Silver-based tri-metal material designed for extreme load applications. Engineered with meticulous attention to detail, King bearings are designed to exact standards to ensure optimal fitment and compatibility with BMW engines. Experience improved smoother engine operation with King Bearings.
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King - Corporate Logo
T#:26538339
Part#: CR224SV0.5
In Stock
$ 54.99 USD
Free Shipping on orders $49 and up
Introducing King Connecting Rod Bearings for BMW Engines: the ultimate solution for enhancing your engine's performance. Crafted with precision and expertise, King's bearings offer unmatched durability and reliability. Designed to meet the demands of high-performance driving, they provide the stability and support your engine needs. Elevate your BMW driving experience with King Bearings. King Rod Bearings for BMW Engines come in sets of 2 (2 Upper and 2 Lower Bearing Shells) Suitable for 2 Con-Rods. The Upper and Lower bearing shells are comprised of a lead-free, Silver-based tri-metal material designed for extreme load applications. Engineered with meticulous attention to detail, King bearings are designed to exact standards to ensure optimal fitment and compatibility with BMW engines. Experience improved smoother engine operation with King Bearings.
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Supertech - Corporate Logo
T#:594815
Part#: GNH7700
In Stock
$ 27.99 USD
Free Shipping on orders $49 and up

Enhance the performance of your MINI N14 or N18 engine with the MINI N14 N18 77.00mm Piston Ring Kit GNH7700. This high-quality piston ring kit is designed to provide optimal sealing and durability for your engine, ensuring smooth operation and reliable performance.

  • Specifically designed for MINI N14 and N18 engines
  • Features a diameter of 77.00mm for precise fitment
  • Ensures optimal sealing to prevent oil leakage and maintain compression
  • Durable construction for long-lasting performance and reliability
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Supertech - Corporate Logo
T#:21472889
Part#: BMEVI-1055S-HS
Ships in 4 Business Days
$ 55.99 USD
Free Shipping on orders $49 and up
Single Groove sodium filled exhaust valves for high performance builds Head Diam: 28mm (std) Material: Inconel-Nimonic / Sodium Filled Groove Type: Single Groove Length: 112.9mm Stem Diam: 5.96mm
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Supertech - Corporate Logo
T#:18302506
Part#: MCIVN-1200S
Ships on Sep 11, 2026
$ 30.99 USD
Free Shipping on orders $49 and up
Supertech - Corporate Logo
T#:26038568
Part#: SPRKH1000DBMST
In Stock
20% off MSRP $ 1,042.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 833.99 USD
Free Shipping on orders $49 and up
20% off MSRP
$ 1,042.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 833.99 USD
Free Shipping on orders $49 and up
Crafted from premium Superclean Chrome Silicon Vanadium Steel alloy, these valve springs offer exceptional performance and durability even at high RPMs. CAD engineering ensures that the wire stress levels remain within defined limits for long-lasting durability, even under extreme racing conditions. Advanced computer software allows Supertech to meticulously control harmonics, ensuring optimal performance. Manufactured with high-quality military-certified Steel, the retainers are CNC machined to provide a precise fit, guaranteeing longevity and reliability.
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King - Corporate Logo
T#:4840520
Part#: CR6640XP
In Stock at Vendor
$ 163.99

This product was last offered at the strikethrough price on
05-22-2026

$ 148.99 USD
Free Shipping
$ 148.99 USD
Free Shipping
These King Performance Series bearings are recommended for performance applications. These bearings are designed for aftermarket gasoline or diesel engine rebuilding and performance engines with OE or upgraded crankshafts. These King Performance Series bearings have an improved crankshaft finish for reducing microscopic ferrite peaks on improperly ground or polished nodular cast iron crankshafts. The bearings feature improved oil clearance to reduce wear and increase engine life, which in turn reduces operating noise, vibration, and excess oil flow.
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King - Corporate Logo
T#:25706094
Part#: CR222GPC
In Stock
$ 96.99 USD
Free Shipping on orders $49 and up
$ 96.99 USD
Free Shipping on orders $49 and up
King's Racing Line of Performance Engine Bearings are for enthusiasts looking for an upgraded, coated connecting rod bearing to replace their OE bearings with. Constructed of a Silver base, these bearings are coated in a polymer-based coating to create a thermal barrier between your connecting rods and crankshaft. This kit includes a full set of bearing shells!
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Supertech - Corporate Logo
T#:1504
Part#: TMS1504
Ships in 5 Business Days
$ 766.99 USD
Free Shipping
$ 766.99 USD
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For M50, M52, M54 S50 and S52 engines, these valve springs are made with premium Superclean Chrome Silicon Vanadium Steel alloy for high performance and durability at high rpms, with better memory. These are extremely high quality, offered at the best price.

Computer designed to ensure that the wire stress levels do not overpass the limits of stress defined in the diagrams of fatigue for long durability under extreme racing conditions. Computer software allows Supertech to make sure that the harmonics are well under control.

The retainers are manufactured with high quality military certified Titanium alloy, CNC machined for a tight fit that will ensure a long durability.

This item fits the following BMWs:
1993-1999 E36 BMW 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
1997-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
1998-2000 Z3 BMW M Roadster M Coupe
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King - Corporate Logo
T#:4840526
Part#: MB5801SM
In Stock
$ 286.00 USD
Free Shipping on orders $49 and up
Introducing King Main Bearings for BMW Engines: the ultimate solution for enhancing your engine's performance. Crafted with precision and expertise, King's bearings offer unmatched durability and reliability. Designed to meet the demands of high-performance driving, they provide the stability and support your engine needs. Elevate your BMW driving experience with King Bearings. Complete Set: King Main Bearings for BMW Engines come as a full set. Silicon-aluminum Bi-Metal Construction: Crafted from King's premium Silicon-aluminum bi-metal material offering exceptional strength, durability, and heat resistance. Precision Engineering: Engineered with meticulous attention to detail, our bearings are designed to exacting standards to ensure optimal fitment and compatibility with BMW engines. Enhanced Performance: Experience improved engine stability and smoother operation with King Bearings.
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Supertech - Corporate Logo
T#:21604313
Part#: KPR-6S-7-24
Ships in 6 Business Days
$ 51.99 USD
Free Shipping on orders $49 and up

BMW M42 M50 M52 M54 6mm Single Groove Valve Keeper is a precision-engineered component essential for securing valves in BMW engines. Turner Motorsport offers this high-quality valve keeper, designed to fit specific Supertech valves for enhanced performance and reliability.

  • Precision Fit: Designed specifically for BMW M42, M50, M52, and M54 engines, ensuring a perfect fit with 6.0mm single groove valves.
  • High-Quality Construction: Made from durable materials to withstand high-pressure conditions and provide long-lasting performance.
  • Enhanced Valve Security: Two keepers are required per valve to securely hold the valve in place, preventing movement and ensuring consistent engine performance.
  • Compatibility: Ideal for use with certain Supertech valves, providing a reliable solution for engine builds and upgrades.
  • Easy Installation: Simple to install with standard tools, offering a hassle-free upgrade or replacement option.
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Supertech - Corporate Logo
T#:4908057
Part#: ST-VSK-S65
Ships in 7 Business Days
$ 469.99 USD
Free Shipping
$ 469.99 USD
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Revitalize your BMW S65 engine's performance with Supertech Beehive Valve Springs – a reliable solution to the common issue of valve spring breakage. Designed as an economical yet high-quality alternative, these valve springs are the perfect complement to Stage 1 and Stage 2 cylinder heads.

  • Enhanced Durability: Crafted from premium Superclean Chrome Silicon Vanadium Steel alloy.
  • High-Performance Design: Withstands high rpms for improved engine performance.
  • Better Memory: Ensures consistent performance under extreme conditions.
  • Precision Engineering: Computer-designed to manage wire stress levels and harmonics.
  • Complementary Upgrade: Ideal for use with Stage 1 and Stage 2 cylinder heads.

Upgrade your BMW S65 engine with Supertech Beehive Valve Springs for reliable and durable performance.

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King - Corporate Logo
T#:4744845
Part#: CR8050SV
In Stock
$ 323.99 USD
Free Shipping on orders $49 and up
Introducing King Connecting Rod Bearings for BMW Engines: the ultimate solution for enhancing your engine's performance. Crafted with precision and expertise, King's bearings offer unmatched durability and reliability. Designed to meet the demands of high-performance driving, they provide the stability and support your engine needs. Elevate your BMW driving experience with King Bearings. King Rod Bearings for the N63/S63 come in a full set suitable for 8 Con-Rods. The Upper and Lower bearing shells are comprised of a lead-free, Silver-based tri-metal material designed for extreme load applications. Engineered with meticulous attention to detail, King bearings are designed to exact standards to ensure optimal fitment and compatibility with BMW engines. Experience improved smoother engine operation with King Bearings.
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Supertech - Corporate Logo
T#:21604314
Part#: KPR-5.0-7S-24
In Stock
$ 72.99

This product was last offered at the strikethrough price on
08-13-2026

$ 67.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 72.99

This product was last offered at the strikethrough price on
08-13-2026

$ 67.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
Two required per valve, for use with certain supertech valves 5.0mm single groove


Supertech - Corporate Logo
T#:23284068
Part#: GNH7750
In Stock
$ 23.99 USD
Free Shipping on orders $49 and up

Experience top-tier performance with Supertech Piston Rings, meticulously crafted in Japan using advanced technology. Engineered for high-performance applications, these piston rings are specifically designed to optimize engine performance in BMW vehicles.

  • Manufactured in Japan with cutting-edge technology for superior quality
  • Specifically designed for high-performance applications
  • Ideal for ensuring peak engine performance in BMW vehicles
  • Four sets required for a complete engine overhaul
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King - Corporate Logo
T#:597152
Part#: CR224SV
In Stock at Vendor
$ 78.99 USD
Free Shipping on orders $49 and up

BMW S65 S85 Connecting Rod Bearing Set of 2 Pairs provides exceptional performance and durability for BMW engines. Engineered by King Bearings, these connecting rod bearings are designed to meet the high demands of high-performance driving, ensuring reliable engine operation. Crafted from a lead-free, silver-based tri-metal material, these bearings offer superior load resistance and stability, making them ideal for both everyday driving and track use.

  • Enhanced Performance: Designed to handle high loads and extreme conditions, providing improved engine reliability and efficiency.
  • Superior Durability: Made from a lead-free, silver-based tri-metal material for exceptional wear resistance and longevity.
  • Precision Engineering: Meticulously crafted to exact specifications for optimal fitment and compatibility with BMW S65 and S85 engines.
  • Smooth Operation: Ensures smoother engine performance and reduced friction, enhancing overall driving experience.
  • High-Performance Ready: Perfect for both street and track applications, meeting the demands of high-performance driving.
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King - Corporate Logo
T#:26538337
Part#: CR224SV0.25
In Stock at Vendor
$ 42.99 USD
Free Shipping on orders $49 and up
Introducing King Connecting Rod Bearings for BMW Engines: the ultimate solution for enhancing your engine's performance. Crafted with precision and expertise, King's bearings offer unmatched durability and reliability. Designed to meet the demands of high-performance driving, they provide the stability and support your engine needs. Elevate your BMW driving experience with King Bearings. King Rod Bearings for BMW Engines come in sets of 2 (2 Upper and 2 Lower Bearing Shells) Suitable for 2 Con-Rods. The Upper and Lower bearing shells are comprised of a lead-free, Silver-based tri-metal material designed for extreme load applications. Engineered with meticulous attention to detail, King bearings are designed to exact standards to ensure optimal fitment and compatibility with BMW engines. Experience improved smoother engine operation with King Bearings.
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Supertech - Corporate Logo
T#:302460
Part#: SPRK-H1000DBM
Ships in 5 Business Days
$ 787.99 USD
Free Shipping
$ 787.99 USD
Free Shipping
Supertech Spring / Retainer kits are precision matched sets for a complete valvetrain overhaul. Developed for the performance enthusiast that wants the best the industry has to offer, Supertech Spring / Retainer kits are second to none in terms of performance, quality and value.
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Supertech - Corporate Logo
T#:18302505
Part#: MCEVI-1200-HS
Ships in 6 Business Days
$ 67.99 USD
Free Shipping on orders $49 and up
King - Corporate Logo
T#:26404878
Part#: TW1046AM
Ships in 3 Business Days
$ 28.99 USD
Free Shipping on orders $49 and up

Enhance your Mini's engine performance with the Performance Thrust Washer Set designed for N12, N14, N16, and N18 1.6L engines. These thrust washers are engineered to provide optimal support and durability, ensuring smooth and efficient operation of critical engine components. With precision manufacturing and high-quality materials, this set offers improved reliability and longevity for your Mini's engine.

  • Enhances engine performance for Mini vehicles
  • Specifically designed for N12, N14, N16, and N18 1.6L engines
  • Provides optimal support and durability for critical engine components
  • Precision manufacturing ensures a perfect fit
  • High-quality materials for improved reliability and longevity
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King - Corporate Logo
T#:25706102
Part#: CR222GPC026
In Stock
$ 101.99 USD
Free Shipping on orders $49 and up
$ 101.99 USD
Free Shipping on orders $49 and up
King's Racing Line of Performance Engine Bearings are for enthusiasts looking for an upgraded, coated connecting rod bearing to replace their OE bearings with. Constructed of a Silver base, these bearings are coated in a polymer-based coating to create a thermal barrier between your connecting rods and crankshaft. Set of 4 Bearing Shells - .026 Oversize
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King - Corporate Logo
T#:26504938
Part#: MB5801SM0.25
In Stock at Vendor
$ 286.00

This product was last offered at the strikethrough price on
05-03-2026

$ 255.99 USD
Free Shipping on orders $49 and up
$ 255.99 USD
Free Shipping on orders $49 and up
Introducing King Main Bearings for BMW Engines: the ultimate solution for enhancing your engine's performance. Crafted with precision and expertise, King's bearings offer unmatched durability and reliability. Designed to meet the demands of high-performance driving, they provide the stability and support your engine needs. Elevate your BMW driving experience with King Bearings. Complete Set: King Main Bearings for BMW Engines come as a full set. Silicon-aluminum Bi-Metal Construction: Crafted from King's premium Silicon-aluminum bi-metal material offering exceptional strength, durability, and heat resistance. Precision Engineering: Engineered with meticulous attention to detail, our bearings are designed to exacting standards to ensure optimal fitment and compatibility with BMW engines. Enhanced Performance: Experience improved engine stability and smoother operation with King Bearings.
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Supertech - Corporate Logo
T#:8549425
Part#: BMIVN-1031S-12
In Stock at Vendor
$ 384.99 USD
Free Shipping
$ 384.99 USD
Free Shipping
Upgraded valves designed for high horsepower applications! Our valves are not finished from generic blanks rather they are specifically designed for each and every application. We work relentlessly, testing and researching every aspect trying to improve the air flow of our designs. With every valve design, we strive to maximize durability through higher fatigue resistance and tensile strength. Each valve tip is hardened beyond 52HRc. It’s unlikely you will find any of our competitor’s valves with stricter dimensional tolerances than our Supertech valves. Combine that with finished seats with equally strict run out tolerances and you won’t find a better sealing, better performing and easier to install solution anywhere! Optimum high flow rates are achieved by ensuring that our valves are manufactured with the best angles for each application. We consider back cut, under cut and valve head angles for each application to produce the optimum high flow rates for each application. In 2006 we introduced our stem Superfinishing as a standard addition to all of our valves at no additional cost. When our Superfinish is combined with our Black Nitrided valve, it reduces the surface roughness to 1/3 of our chrome coated valve. The end result… unsurpassed performance and durability. Our intake valves are made exclusively from an enhanced versions of EV8 (21-4N) steel. Black Nitride Coating: This is a hardening treatment that has been steadily growing in popularity over the last several years. These black Nitride coated valves feature harder surfaces and smoother finishes, providing less friction and subsequently longer life. Please see below for more benefits of our Black Nitride valves. Black Nitride Coating Head Diam: 33mm Material: Stainless Steel 21-4N Groove Type: Triple Groove Length: 123.7mm Stem Diam: 6.95mm
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King - Corporate Logo
T#:10974874
Part#: CR4633SM
In Stock
$ 108.99 USD
Free Shipping
$ 108.99 USD
Free Shipping

Elevate your engine's performance to new heights with King SI-Series bearings, meticulously crafted to meet OE applications. Whether you're working on aftermarket gasoline or diesel engine rebuilding projects or enhancing the performance of engines equipped with OE crankshafts, these bearings are the perfect choice.

Key Features:

  • Enhanced Crankshaft Finish: The bearings feature an improved crankshaft finish to reduce microscopic ferrite peaks on improperly ground or polished nodular cast iron crankshafts.
  • Optimized Oil Clearance: Experience reduced wear and extended engine life thanks to improved oil clearance, resulting in smoother engine operation.
  • Noise and Vibration Reduction: These bearings are designed to reduce operating noise and vibration, ensuring a quieter and more comfortable driving experience.
  • Efficient Oil Flow: Benefit from decreased excess oil flow, promoting efficient lubrication and reduced oil consumption.

Choose King SI-Series bearings for your engine and enjoy enhanced performance, increased longevity, and reduced noise and vibration. Upgrade your engine with confidence.

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Supertech - Corporate Logo
T#:7403169
Part#: SPRK-2521-2BM-T1
In Stock
$ 1,050.99

This product was last offered at the strikethrough price on
05-03-2026

$ 919.99 USD
Limited Qty Sale
Free Shipping
$ 1,050.99

This product was last offered at the strikethrough price on
05-03-2026

$ 919.99 USD
Limited Qty Sale
Free Shipping
Dual valve spring kit to be used with triple groove valves and OEM locks.
Supertech - Corporate Logo
T#:640986
Part#: BMEVN-1031S
Ships in 8 Business Days
$ 23.99 USD
Free Shipping on orders $49 and up
Upgraded valves designed for high horsepower applications! Our valves are not finished from generic blanks rather they are specifically designed for each and every application. We work relentlessly, testing and researching every aspect trying to improve the air flow of our designs. With every valve design, we strive to maximize durability through higher fatigue resistance and tensile strength. Each valve tip is hardened beyond 52HRc. It’s unlikely you will find any of our competitor’s valves with stricter dimensional tolerances than our Supertech valves. Combine that with finished seats with equally strict run out tolerances and you won’t find a better sealing, better performing and easier to install solution anywhere! Optimum high flow rates are achieved by ensuring that our valves are manufactured with the best angles for each application. We consider back cut, under cut and valve head angles for each application to produce the optimum high flow rates for each application. In 2006 we introduced our stem Superfinishing as a standard addition to all of our valves at no additional cost. When our Superfinish is combined with our Black Nitrided valve, it reduces the surface roughness to 1/3 of our chrome coated valve. The end result… unsurpassed performance and durability. Our exhaust valves are made from EV16 (21-8N) or EV8-Nb/w for greater strength at higher temperatures. Black Nitride Coating: This is a hardening treatment that has been steadily growing in popularity over the last several years. These black Nitride coated valves feature harder surfaces and smoother finishes, providing less friction and subsequently longer life. Please see below for more benefits of our Black Nitride valves. Head Diam: 31.50mm Material: Black Nitride Groove Type: Single Groove Length: 105.65mm Stem Diam: 5.95mm Size: 1mm+
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King - Corporate Logo
T#:25706104
Part#: MB7776SI0.5
In Stock
$ 118.99

This product was last offered at the strikethrough price on
05-03-2026

$ 94.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 118.99

This product was last offered at the strikethrough price on
05-03-2026

$ 94.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
Introducing King Main Bearings for BMW Engines: the ultimate solution for enhancing your engine's performance. Crafted with precision and expertise, King's bearings offer unmatched durability and reliability. Designed to meet the demands of high-performance driving, they provide the stability and support your engine needs. Elevate your BMW driving experience with King Bearings. Complete Set: King Main Bearings for BMW Engines come as a full set. Silicon-aluminum Bi-Metal Construction: Crafted from King's premium Silicon-aluminum bi-metal material offering exceptional strength, durability, and heat resistance. Precision Engineering: Engineered with meticulous attention to detail, our bearings are designed to exacting standards to ensure optimal fitment and compatibility with BMW engines. Enhanced Performance: Experience improved engine stability and smoother operation with King Bearings.
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King - Corporate Logo
T#:22723773
Part#: MB5758SI
In Stock
$ 151.99 USD
Free Shipping on orders $49 and up

King SI-Series bearings offer a comprehensive solution for various engine applications. Whether you have an OE engine or are working on an aftermarket gasoline or diesel engine project, these bearings are designed to meet your needs. They are also an excellent choice for performance engines with OE crankshafts.

Key Features:

  • Enhanced Crankshaft Finish: The King SI-Series bearings feature an improved crankshaft finish, effectively reducing microscopic ferrite peaks commonly found on improperly ground or polished nodular cast iron crankshafts.
  • Improved Oil Clearance: These bearings provide superior oil clearance, resulting in reduced wear and extended engine life. This improved clearance leads to smoother engine operation with less noise and vibration.
  • Efficient Oil Flow: King SI-Series bearings are engineered to manage oil flow effectively, helping to minimize excess oil consumption, and ensuring optimal lubrication of your engine components.

Elevate your engine's performance, reduce wear and tear, and enjoy quieter, smoother operation with King SI-Series bearings. Upgrade your engine components confidently with these high-quality bearings.

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King - Corporate Logo
T#:23416504
Part#: CR4538CA
In Stock at Vendor
$ 85.99

This product was last offered at the strikethrough price on
08-18-2026

$ 78.99 USD
Free Shipping on orders $49 and up
$ 78.99 USD
Free Shipping on orders $49 and up
Enhance your Mini's engine performance with King SI-Series bearings, ideal for OE applications, aftermarket gasoline or diesel engine rebuilding, and performance engines featuring OE crankshafts. These bearings boast improved crankshaft finishing, specifically designed to diminish microscopic ferrite peaks on nodular cast iron crankshafts. With improved oil clearance, they reduce wear, extending engine life while minimizing operating noise, vibration, and excess oil flow.
  • Recommended for OE applications and aftermarket engine rebuilding
  • Ideal for gasoline or diesel performance engines with OE crankshafts
  • Improved crankshaft finish reduces microscopic ferrite peaks
  • Enhances oil clearance to reduce wear and increase engine lifespan
  • Reduces operating noise, vibration, and excess oil flow
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Supertech - Corporate Logo
T#:18302503
Part#: SPR-MC56BE
In Stock
$ 261.99 USD
Free Shipping
$ 261.99 USD
Free Shipping

Performance Valve Spring Kit

This valve spring kit, designed for performance built engines, is a critical component for those demanding peak performance from their vehicles. The kit includes a set of 16 springs that mount to the stock OEM retainers.

Key Features:

  • Valve Spring Type: Beehive Spring
  • Outer Spring Outer Diameter: 23.30mm
  • Outer Spring Inner Diameter: 16.80mm
  • Inner Spring Outer Diameter: 18.80mm
  • Inner Spring Inner Diameter: 12.30mm
  • Pressure Seat: 65 @ 33.6mm
  • Pressure Open: 163 @ 10
  • Maximum Lift: 11.40mm
  • Coil Bind: 22.20mm
  • Spring Rate: 9.80mm
  • Retainer: OEM Retainer + OEM Seat

Upgrade your engine's performance with this high-quality valve spring kit, ensuring optimum power and reliability.

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King - Corporate Logo
T#:25739335
Part#: CR6887GPC
In Stock
$ 279.99 USD
Free Shipping on orders $49 and up
Upgrade to King's Racing Line of performance, coated engine bearings. Featuring a Full Set of Silver Bearings coated with a nano-thermal barrier for superior longevity!
Supertech - Corporate Logo
T#:21604329
Part#: P6-BMN55-84-T-6
In Stock
$ 984.99

This product was last offered at the strikethrough price on
05-21-2026

$ 904.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 984.99

This product was last offered at the strikethrough price on
05-21-2026

$ 904.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
​Supertech forged pistons are a great choice for performance engine builds! Bore: 84.00mm Over Size: STD Comp Ratio: 10.2:1 Dome dish: -10.4 Head CCs: 37cc Comp Height: 32.40mm Stroke: 89.60mm Skirt style: Slipper Design Rod Length: 141.35mm Pin Diam: 22mm Material: 4032 Application: All Motor / Turbo Ring part number: R84-GNH8400 (MUST BE PURCHASED SEPARATELY)
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King - Corporate Logo
T#:26504931
Part#: MB5784SI0.5
In Stock at Vendor
$ 145.99 USD
Free Shipping on orders $49 and up
Introducing King Main Bearings for BMW Engines: the ultimate solution for enhancing your engine's performance. Crafted with precision and expertise, King's bearings offer unmatched durability and reliability. Designed to meet the demands of high-performance driving, they provide the stability and support your engine needs. Elevate your BMW driving experience with King Bearings. Complete Set: King Main Bearings for BMW Engines come as a full set. Silicon-aluminum Bi-Metal Construction: Crafted from King's premium Silicon-aluminum bi-metal material offering exceptional strength, durability, and heat resistance. Precision Engineering: Engineered with meticulous attention to detail, our bearings are designed to exacting standards to ensure optimal fitment and compatibility with BMW engines. Enhanced Performance: Experience improved engine stability and smoother operation with King Bearings.
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King - Corporate Logo
T#:26538359
Part#: CR8050SV0.5
In Stock at Vendor
$ 324.99 USD
Free Shipping on orders $49 and up
Introducing King Connecting Rod Bearings for BMW Engines: the ultimate solution for enhancing your engine's performance. Crafted with precision and expertise, King's bearings offer unmatched durability and reliability. Designed to meet the demands of high-performance driving, they provide the stability and support your engine needs. Elevate your BMW driving experience with King Bearings. King Rod Bearings for the N63/S63 come in a full set suitable for 8 Con-Rods. The Upper and Lower bearing shells are comprised of a lead-free, Silver-based tri-metal material designed for extreme load applications. Engineered with meticulous attention to detail, King bearings are designed to exact standards to ensure optimal fitment and compatibility with BMW engines. Experience improved smoother engine operation with King Bearings.
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King - Corporate Logo
T#:26638194
Part#: CR6887SV
In Stock at Vendor
$ 237.99 USD
Free Shipping on orders $49 and up
Introducing King Connecting Rod Bearings for BMW Engines: the ultimate solution for enhancing your engine's performance. Crafted with precision and expertise, King's bearings offer unmatched durability and reliability. Designed to meet the demands of high-performance driving, they provide the stability and support your engine needs. Elevate your BMW driving experience with King Bearings. King Rod Bearings for BMW Engines come in a full set, including 6 upper and 6 lower bearing shells, suitable for 6 Con-Rods. The Upper and Lower bearing shells are comprised of a lead-free, Silver-based tri-metal material designed for extreme load applications. Engineered with meticulous attention to detail, King bearings are designed to exact standards to ensure optimal fitment and compatibility with BMW engines. Experience improved smoother engine operation with King Bearings.
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King - Corporate Logo
T#:26504942
Part#: MB7779SM
In Stock at Vendor
$ 102.99 USD
Free Shipping on orders $49 and up
Introducing King Main Bearings for BMW Engines: the ultimate solution for enhancing your engine's performance. Crafted with precision and expertise, King's bearings offer unmatched durability and reliability. Designed to meet the demands of high-performance driving, they provide the stability and support your engine needs. Elevate your BMW driving experience with King Bearings. Complete Set: King Main Bearings for BMW Engines come as a full set. Silicon-aluminum Bi-Metal Construction: Crafted from King's premium Silicon-aluminum bi-metal material offering exceptional strength, durability, and heat resistance. Precision Engineering: Engineered with meticulous attention to detail, our bearings are designed to exacting standards to ensure optimal fitment and compatibility with BMW engines. Enhanced Performance: Experience improved engine stability and smoother operation with King Bearings.
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King - Corporate Logo
T#:24876324
Part#: CR8049SV
In Stock at Vendor
$ 378.99

This product was last offered at the strikethrough price on
06-18-2026

$ 332.99 USD
Free Shipping on orders $49 and up
$ 332.99 USD
Free Shipping on orders $49 and up
King - Corporate Logo
T#:23416520
Part#: MB5667SI
Ships in 6 Business Days
$ 198.99 USD
Free Shipping on orders $49 and up
Upgrade your Mini's engine with King SI-Series main bearings, ideal for OE applications, aftermarket gasoline or diesel engine rebuilding, and performance engines featuring OE crankshafts. These main bearings boast an improved crankshaft finish, effectively reducing microscopic ferrite peaks on nodular cast iron crankshafts. With enhanced oil clearance, they minimize wear, prolonging engine life while decreasing operating noise, vibration, and excess oil flow.
  • Recommended for OE applications and aftermarket engine rebuilding
  • Ideal for gasoline or diesel performance engines with OE crankshafts
  • Reduces microscopic ferrite peaks on crankshafts for improved durability
  • Enhances oil clearance to reduce wear and increase engine lifespan
  • Reduces operating noise, vibration, and excess oil flow
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King - Corporate Logo
T#:16707423
Part#: CR6877XP
In Stock at Vendor
$ 300.99 USD
Free Shipping on orders $49 and up
King's Racing Line of Performance Engine Bearings are for enthusiasts looking for an upgraded, coated connecting rod bearing to replace their OE bearings with. Constructed of a Silver base, these bearings are coated in a polymer-based coating to create a thermal barrier between your connecting rods and crankshaft. Complete Set of Bearing Shells
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King - Corporate Logo
T#:597153
Part#: MB637CA
In Stock
$ 230.99

This product was last offered at the strikethrough price on
07-17-2026

$ 189.99 USD
Free Shipping
$ 189.99 USD
Free Shipping
These King SI-Series bearings are recommended for OE applications. These bearings are designed for aftermarket gasoline or diesel engine rebuilding and performance engines with OE crankshafts. These King SI-Series bearings have an improved crankshaft finish for reducing microscopic ferrite peaks on improperly ground or polished nodular cast iron crankshafts. These King SI-Series bearings feature improved oil clearance to reduce wear and increase engine life, which in turn reduces operating noise, vibration, and excess oil flow.
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