BMW Internal Engine Parts for BMW X Series E83 (2004-2010)

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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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N20 N52 N54 N55 Connecting Rod Bearing Set of 2 Pairs - Std. Size
N20 N52 N54 N55 Connecting Rod Bearing Set of 2 Pairs - Std. Size ...
King - Corporate Logo
T#:598331
Part#: CR222SV
In Stock
$ 52.00 USD
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$ 52.00 USD
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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 Upgraded Valve Stem Seal Kit - BMW S54 S52 S50 M54 M52 M50
Supertech Upgraded Valve Stem Seal Kit - BMW S54 S52 S50 M54 M52 M50 ...
Supertech - Corporate Logo
T#:641030
Part#: VS-VBM6-6CYLKT
In Stock
$ 27.99 USD
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$ 27.99 USD
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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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BMW N20 N52 N54 N55 Connecting Rod Bearing Set of 2 Pairs - 0.25mm Oversized
BMW N20 N52 N54 N55 Connecting Rod Bearing Set of 2 Pairs - 0.25mm Ov...
+0.25mm
King - Corporate Logo
T#:597151
Part#: CR222SV0.25
In Stock
$ 52.00 USD
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$ 52.00 USD
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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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Engine Main Bearing Kit - Standard Size
Engine Main Bearing Kit - Standard Size
Standard Size
King - Corporate Logo
T#:599337
Part#: MB7776SI
In Stock
$ 79.99 USD
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$ 79.99 USD
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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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BMW N20 N52 N54 N55 S55 Connecting Rod Bearing Set of 2 Pairs - 0.50mm Oversized
BMW N20 N52 N54 N55 S55 Connecting Rod Bearing Set of 2 Pairs - 0.50m...
+0.50mm
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
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$ 48.99 USD
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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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Engine Main Bearing Kit - Size 0.25 Oversized
Engine Main Bearing Kit - Size 0.25 Oversized
+0.25mm
King - Corporate Logo
T#:597154
Part#: MB7776SI0.25
In Stock
$ 118.99 USD
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$ 118.99 USD
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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 Performance BMW S54 Main Bearings - Std.
King Performance BMW S54 Main Bearings - Std.
King - Corporate Logo
T#:25706115
Part#: MB7039AM
In Stock
$ 169.99 USD
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$ 169.99 USD
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Connecting Rod Bearing Set of 2 Pairs - 0.75mm Oversized
Connecting Rod Bearing Set of 2 Pairs - 0.75mm Oversized
+0.75mm
King - Corporate Logo
T#:4840521
Part#: CR222SV0.75
In Stock
$ 33.99

This product was last offered at the strikethrough price on
03-20-2026

$ 32.79 USD
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$ 32.79 USD
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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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Performance Rod Bearing Set - Standard Size
Performance Rod Bearing Set - Standard Size
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
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$ 148.99 USD
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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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SuperTech Dual Valve Spring Upgrade Kit w/ Steel Retainers - 80lbs - BMW M50 M52 M54 S52
SuperTech Dual Valve Spring Upgrade Kit w/ Steel Retainers - 80lbs - ...
Supertech - Corporate Logo
T#:26038568
Part#: SPRKH1000DBMST
In Stock at Vendor
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
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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
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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 Performance BMW N54B30A/N55B30A Rod Bearings - 2 Pairs
King Performance BMW N54B30A/N55B30A Rod Bearings - 2 Pairs
King - Corporate Logo
T#:25706094
Part#: CR222GPC
In Stock
$ 96.99 USD
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$ 96.99 USD
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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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BMW M42 M50 M52 M54 6mm Single Groove Valve Keeper - Set Of 24
BMW M42 M50 M52 M54 6mm Single Groove Valve Keeper - Set Of 24 ...
Supertech - Corporate Logo
T#:21604313
Part#: KPR-6S-7-24
Ships in 6 Business Days
$ 51.99 USD
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$ 51.99 USD
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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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King Performance BMW M50 Rod Bearings - Std.
King Performance BMW M50 Rod Bearings - Std.
King - Corporate Logo
T#:25706122
Part#: CR6640SM
In Stock
$ 178.99 USD
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$ 178.99 USD
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King Performance BMW N54/N55 Rod Bearings - 2 Pairs
King Performance BMW N54/N55 Rod Bearings - 2 Pairs
King - Corporate Logo
T#:25706102
Part#: CR222GPC026
In Stock
$ 101.99 USD
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$ 101.99 USD
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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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Engine Main Bearing Kit - Size 0.50 Oversized
Engine Main Bearing Kit - Size 0.50 Oversized
+0.50mm
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
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$ 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
Add to Wish List
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 Performance BMW S54 Main Bearings - .25 Oversize
King Performance BMW S54 Main Bearings - .25 Oversize
King - Corporate Logo
T#:25706120
Part#: MB7039AM0.25
Ships in 6 Business Days
$ 178.99 USD
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$ 178.99 USD
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Replace your worn out OE main bearings with King's .25 Oversize Performance S54 Main Bearing Set!
Performance Camshaft Set - 238/272
Performance Camshaft Set - 238/272
Schrick - Corporate Logo
T#:26904914
Part#: SCH-N52-238/272
Special Order: No Guaranteed ETA
$ 1,749.99 USD
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$ 1,749.99 USD
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Supertech 6mm Intake Valve Stem Seal - Polyacrylic - BMW S54 S52 S50 M54 M52 M50 M42
Supertech 6mm Intake Valve Stem Seal - Polyacrylic - BMW S54 S52 S50 ...
Supertech - Corporate Logo
T#:641011
Part#: VS-VBM6I
In Stock
$ 1.99 USD
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$ 1.99 USD
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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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Supertech 6mm Exhaust Valve Stem Seal - Viton - BMW S54 S52 S50 M54 M52 M50 M42
Supertech 6mm Exhaust Valve Stem Seal - Viton - BMW S54 S52 S50 M54 M...
Supertech - Corporate Logo
T#:641010
Part#: VS-VBM6E
In Stock
$ 1.99 USD
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$ 1.99 USD
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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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Single Groove Valve Keeper 6mm - Priced Each
Single Groove Valve Keeper 6mm - Priced Each
Supertech - Corporate Logo
T#:3268708
Part#: KPR-6S-7
In Stock
$ 5.99

This product was last offered at the strikethrough price on
03-04-2026

$ 2.99 USD
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$ 2.99 USD
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Two required per valve, for use with certain supertech valves 6.0mm single groove
SuperTech Dual Valve Spring Upgrade Kit w/ Steel Retainers - 67lbs - BMW M50 M52 M54 S52
SuperTech Dual Valve Spring Upgrade Kit w/ Steel Retainers - 67lbs - ...
Supertech - Corporate Logo
T#:51426477
Part#: SPRKH100DRBMST
Back Ordered
New Item
$ 833.99 USD
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$ 833.99 USD
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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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Valve keeper for Audi/BMW/Opel 6mm stem Triple groove - Supertech
Valve keeper for Audi/BMW/Opel 6mm stem Triple groove - Supertech ...
Supertech - Corporate Logo
T#:26704985
Part#: KPR-VW6-T
Ships in 8 Business Days
$ 1.99 USD
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$ 1.99 USD
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