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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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Rein Piston Rings - Set - Single Piston - E36, Z3
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Rein - Corporate Logo
T#:591603
Part#: 11251405783
Back Ordered
$ 43.99 USD
Free Shipping on orders $49 and up
Replace your worn out piston rings with OE replacements - 86.415mm
Rein Piston Rings - Set - Single Piston
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:592808
Part#: 11251247917
Ships in 4 Business Days
$ 36.99 USD
Free Shipping on orders $49 and up
Replace your worn out piston rings with OE replacements - 85.065mm
VAC Motorsports - Corporate Logo
T#:1061445
Part#: VAC-HPRBK-S65
In Stock
$ 799.99 USD
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$ 799.99 USD
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VAC's S65 bearings are embraced by BMW engine builders world wide. Popular for both forced induction and N/A builds, their coated bearings are "friction resistant" making thermal breakdowns that can occur due to lack of lubrication a much less common occurrence. Helping to prevent premature engine failures on street cars, and spun bearings under stress at the track when things are most critical.
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Rein Piston Ring Set
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Rein - Corporate Logo
T#:379819
Part#: 11251437077
Ships in 4 Business Days
$ 31.99 USD
Free Shipping on orders $49 and up
Standard bore replacement piston rings

Rein Piston Ring - Priced Per Piston - E28, E30, E34, E36
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Rein - Corporate Logo
T#:379806
Part#: 11251713192
Ships in 3 Business Days
$ 30.99 USD
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$ 30.99 USD
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For use on stock pistons, will need 6 sets to replace all piston rings in the engine
Rein Piston Ring Set - Priced Per Piston
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:592811
Part#: 11251713178
Ships in 4 Business Days
$ 28.99 USD
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Replace your worn rings - 84.000mm

VAC Motorsports - Corporate Logo
T#:7164819
Part#: VAC-HPRBS-S54
Ships on Aug 4, 2026
$ 479.99 USD
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$ 479.99 USD
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BMW S54 VAC Performance Coated Rod Bearing Kit is highly regarded by BMW engine builders worldwide for its superior quality and performance. Ideal for both forced induction and naturally aspirated builds, these coated bearings are designed to be friction-resistant, reducing the risk of thermal breakdowns due to inadequate lubrication. This feature significantly decreases the chances of premature engine failure in street cars and minimizes the risk of spun bearings during high-stress track conditions.

The VAC Performance Coated Rod Bearing Kit is proven to help maintain engine reliability, even in situations with reduced oil pressure.

  • Enhanced Durability: Coated bearings are friction-resistant, reducing the risk of thermal breakdown.
  • Increased Reliability: Helps prevent premature engine failure and spun bearings under stress.
  • Versatile Performance: Suitable for both forced induction and naturally aspirated engine builds.
  • Proven Track Record: Tested by customers to ensure reliable performance even with oil pressure loss.

VAC Tech Notes:

  • Ensure proper tolerance and size checks before installation.
  • Professional installation is recommended due to specialized tools required.
  • Returns are not available on any engine bearings.
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VAC Motorsports - Corporate Logo
T#:17538610
Part#: ARP-HSK-N54-14
In Stock
$ 599.99 USD
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$ 599.99 USD
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The VAC Motorsports ARP Head Stud Kit was put together by VAC and ARP’s finest engineers. This is a completely custom kit designed specifically for the almighty N54. *High Boost (25+ psi application) option features: (14) 11mm ARP Head Studs (14) ARP Washers for 11mm Studs (14) ARP Nuts for 11mm Studs Install Tips: MUST drill and tap the (4) 9mm holes in the engine block to make them 11mm holes. This way all the engine block holes are 11mm, and fit ALL (14) 11mm Studs. Torque Specs: All studs torque down through 3-equal steps to 95 ft lbs ***This is NOT the Chrysler and Volvo stud kits! VAC Motorsports and ARP engineers designed and assembled this kit with high grade material, specifically so standard street-use or high-boost N54 owners have a PROPER kit that does not fail over time, such as the retro-fit Chrysler and Volvo head stud kits. ARP is the world leader in fastener technology. Makers of the finest fasteners in the market, especially for BMW engines, ARP is the brand you can count on when you want the highest reliability possible. If you are looking for high performance from your BMW engine, then ARP Head Stud Kits are a must. All kits come complete with hardened parallel-ground washers and aerospace-quality nuts.
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VAC Motorsports - Corporate Logo
T#:1061441
Part#: ARP-HSK-N54
Ships in 4 Business Days
$ 554.99 USD
Free Shipping
$ 554.99 USD
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Despite the fact that BMW engineers some of the worlds most revered engines, during number crunching something always has to be a compromise. One item that is always found to be a weak point- the OEM hardware. It is definitely sub-par for real performance use under high stress such as modded engines and track use. We use these fasteners on all of VAC's in-house head builds. Whenever the head is coming off, your switching to forced induction, or if you are simply prepping to drive your car hard; we highly recommend switching to far superior race-grade hardware. These Head Stud Kits greatly improve reliability; helping to eliminate movement of the of the cylinder head and intern, gasket failure caused by inferior OEM head-bolt stretch. This is the #1 cause of premature head gasket failure, especially on boosted or high output engines. Though more expensive than OEM, converting to one of VAC's head studs kits will not only give added strength and reliability when its needed most, but provides the most accurate torque readings because studs don’t “twist” into the block; all clamping forces are on one axis, and there is less force exerted on the normally stressed threads of the block. This increases block and hardware life and typically makes the head easier to properly install to the block, a blessing if your head may have to be removed more than once. Especially in the time crunch of racing, when engines are dissembled frequently, studs make removing and installing the cylinder head on to the block a much easier task. By allowing the studs to act as a guide on to the head, your head slides on and off and also ensures proper alignment of the head and gasket for the same reason. It is similar to converting your wheel-bolts to wheel-studs.
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VAC Motorsports - Corporate Logo
T#:4731086
Part#: SCH-CSS-S52-276/
Ships in 2 Business Days
$ 2,640.99 USD
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$ 2,640.99 USD
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Elevate your BMW's engine performance with Schrick's premium camshafts, crafted with over 40 years of dedication to excellence. Catering to both street and track enthusiasts, Schrick ensures top-quality materials for strength and accuracy. This renowned brand has formed a lasting bond with BMW enthusiasts, providing advanced camshaft options that have stood the test of time.

  • Premium Schrick camshafts for BMW
  • Over 40 years of dedicated engine performance expertise
  • Ideal for both street and track applications
  • Top-quality materials for strength and accuracy
  • Trusted by BMW enthusiasts worldwide
  • Advanced engine testing and manufacturing technology
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Rein Piston Rings - Set - Single Piston - E30, E36
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:591604
Part#: 11251727461
Ships in 4 Business Days
$ 31.99 USD
Free Shipping on orders $49 and up
Replace your worn out piston rings with OE replacements - 84.000mm
VAC Motorsports - Corporate Logo
T#:23847551
Part#: CP-FPS-M20-B25
Ships in 2 Business Days
$ 1,399.99 USD
Free Shipping on orders $49 and up

Elevate Your Engine's Performance with Customizable CP Pistons

When it comes to optimizing your engine's performance, flexibility is key. That's why we offer a range of CP pistons with customizable compression ratios to cater to your specific needs. Whether you're embarking on a basic engine rebuild, planning to implement a low boost turbo or supercharger, or aiming to maximize power with high-performance camshafts, we have the ideal piston solution for you.

Our collaboration with CP ensures that you'll receive pistons of the highest quality, meticulously designed to meet the most demanding expectations. These pistons are a top choice for high-performance and racing engines.

We maintain a diverse selection of compression ratios in stock, making it convenient to find the right fit for your project. And if you require a custom piston application, our efficient service has you covered.

  • BORE: 84mm
  • Rod Length: 135mm
  • Compression Ratio: 8.5:1
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Rein Exhaust Valve - E34, E36, E39, E46, Z3
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:379738
Part#: 11341739823
Ships on Aug 5, 2026
$ 20.99 USD
Free Shipping on orders $49 and up
Replacement exhaust valve
VAC Motorsports - Corporate Logo
T#:11857228
Part#: JE-FPS-M52-84-10
Ships on Aug 4, 2026
$ 1,439.99 USD
Free Shipping on orders $49 and up

Boost Your BMW's Engine with JE Pistons

Upgrade your BMW's engine with the JE Pistons Forged Piston Set designed for the M52 engine. These high-quality forged pistons feature a diameter of 84mm and a compression ratio of 10.5:1, ensuring improved performance and reliability for your BMW.

  • Enhances engine performance and reliability
  • Precision-engineered for optimal fit and function
  • High-quality forged construction ensures durability
  • Designed specifically for the M52 engine
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VAC Motorsports - Corporate Logo
T#:638307
Part#: VAC-HPRBS-S14STD
Ships on Aug 4, 2026
$ 249.99 USD
Free Shipping on orders $49 and up
VAC Rod Bearing Sets are specially coated to reduce friction to a minimum; enabling lower temps and faster revolutions in your expensive S14 engine. The coated bearings are thermal breakdown resistant, helping to prevent premature engine failures under stress when things are most critical. The rod bearing area is a common stress area in the S14, these bearings can last much longer than any normal bearing sets and are used in all of VAC's highest performance BMW engine builds. These bearings have become a favorite product of all of VAC's race and engine building customers around the globe who have reported unparalleled wear characteristics under all conditions. Made for VAC by the same company who manufactures for the US military, NASCAR teams, and other customers that require "mission-critical" quality. If you are looking for high-performance rod bearings, this is the set for your S14. VAC Tech Notes: As with all bearings, please check your tolerances and size before installation. Due to the specialized tools needed, professional install recommended. There are no returns available on any engine bearings.
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VAC Motorsports - Corporate Logo
T#:1061435
Part#: ARP-RBS-M20
Ships on Aug 4, 2026
$ 314.99 USD
Free Shipping
$ 314.99 USD
Free Shipping
ARP, the world’s leader in fastener technology. There is no substitute for the best! Planning to boost your M20? Building a high HP stroker engine? This rod bolt kit is for you! This kit provides higher strength, more clamping power, and the option to re-use the hardware unlike your OEM bolts. We run these in many of our own builds as well and are 110% satisfied with the fit and finish of these ARP bolts. We offer a 53mm UHL version for those running OEM M20 rods or a 44mm UHL version for those who have upgraded to S50/S52 OEM rods.
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JM Turbo Coopers - Corporate Logo
T#:31522922
Part#: JM-SVG
In Stock
$ 6.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 6.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
OEM Rein Camshaft / Crankshaft Sensor O-Ring - Multiple BMWs ...
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:12463
Part#: 12141748398
In Stock
$ 4.99

This product was last offered at the strikethrough price on
06-29-2026

$ 2.75 USD
Free Shipping on orders $49 and up
$ 2.75 USD
Free Shipping on orders $49 and up
This is the o-ring used for most BMW camshaft sensors and crankshaft sensors. Although most sensors that we sell come with this o-ring at no charge, they may be the source of oil or fluid leaks.

Aluminum Cylinder Head Bolt Set
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:594302
Part#: 11120392547
In Stock
$ 12.35

This product was last offered at the strikethrough price on
05-07-2026

$ 7.89 USD
Free Shipping on orders $49 and up
$ 7.89 USD
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If you remove your cylinder head replacement head bolts are a must. These bolts are designed to be torqued down and not reused.
Rein Exhaust Valve - Sold Each - E28, E30, E34
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:584424
Part#: 11341708896
In Stock
Sale - Save 9% $ 18.35

This product was last offered at the strikethrough price on
05-14-2026

$ 16.65 USD
Free Shipping on orders $49 and up
Sale - Save 9%
$ 18.35

This product was last offered at the strikethrough price on
05-14-2026

$ 16.65 USD
Free Shipping on orders $49 and up
Replace your worn valves

VAC Motorsports - Corporate Logo
T#:27372135
Part#: VAC-HPRBK-S62
Ships in 2 Business Days
$ 999.99 USD
Free Shipping on orders $49 and up

VAC Motorsports High-Performance Rod Bearing Kit for BMW S62 Engine

Experience unparalleled reliability and performance enhancement for your BMW S62 engine with VAC Motorsports' High-Performance Rod Bearing Kit. Designed to address the Achilles heel of S62 engines, these rod bearings are a favorite among BMW enthusiasts and engine builders worldwide. Say goodbye to thermal breakdowns and friction issues with this kit that includes ARP connecting rod bolts, VAC Motorsports' coated rod bearing set, and ARP assembly lubricant. Maximize efficiency and prevent costly engine failures with this essential upgrade.

  • Enhanced reliability for forced induction and high-power N/A builds
  • Friction-resistant bearings for optimal performance
  • Immune to thermal breakdowns caused by lubrication issues
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Piston Ring - Priced Per Piston | BMW M54 3.0L Engine
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:591606
Part#: 11257506252
Ships in 4 Business Days
$ 48.99 USD
Free Shipping on orders $49 and up

Piston Ring - Priced Per Piston | BMW M54 3.0L Engine is a vital component in maintaining proper compression and oil control in BMW M54 3.0L engines. Over time, piston rings experience wear from continuous movement within the cylinder bore, leading to decreased engine efficiency. Worn or damaged rings can result in excessive oil consumption, reduced performance, and visible black or blue smoke from the exhaust. Ideal for engine rebuilds, this high-quality replacement ensures optimal sealing and longevity.

  • Restores proper compression and oil control for improved engine performance
  • Reduces oil consumption and minimizes exhaust smoke
  • Direct-fit replacement for BMW M54 3.0L engine pistons
  • Manufactured from high-strength materials for durability and longevity
  • Essential for engine rebuilds and maintaining peak efficiency
  • Designed to withstand high temperatures and pressures for reliable operation
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Rein Alusil Piston Ring Repair Kit - E38, E39, E53
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:591608
Part#: 11259071606
Ships in 4 Business Days
$ 37.99 USD
Free Shipping on orders $49 and up
$ 37.99 USD
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Set of rings for one piston


OEM Rein Rocker Arm Shaft Plug - E28 E30 E34
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:583592
Part#: 11331264519
In Stock at Vendor
$ 6.11 USD
Free Shipping on orders $49 and up
This is an OEM Rein replacement rocker arm shaft plug, also referred to by BMW as a Blind Plug. This plug connects to the end of the rocker arm shafts. 4 required per vehicle. Replace your old plugs to keep everything properly sealed.
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VAC Motorsports - Corporate Logo
T#:22591977
Part#: CP-FPS-M20-B25-8
Ships in 7 Business Days
$ 1,399.99 USD
Free Shipping on orders $49 and up

Elevate Your Engine's Performance with Customizable CP Pistons

When it comes to optimizing your engine's performance, flexibility is key. That's why we offer a range of CP pistons with customizable compression ratios to cater to your specific needs. Whether you're embarking on a basic engine rebuild, planning to implement a low boost turbo or supercharger, or aiming to maximize power with high-performance camshafts, we have the ideal piston solution for you.

Our collaboration with CP ensures that you'll receive pistons of the highest quality, meticulously designed to meet the most demanding expectations. These pistons are a top choice for high-performance and racing engines.

We maintain a diverse selection of compression ratios in stock, making it convenient to find the right fit for your project. And if you require a custom piston application, our efficient service has you covered.

  • BORE: 85mm
  • Rod Length: 135mm
  • Compression Ratio: 8.8:1
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VAC Motorsports - Corporate Logo
T#:27705421
Part#: VAC-FCS-S85-G2
Ships on Aug 4, 2026
$ 1,799.99 USD
Free Shipping on orders $49 and up

VAC Motorsports - Corporate Logo
T#:34583154
Part#: CP-FPS-M20-B25A
Ships on Aug 4, 2026
$ 1,399.99 USD
Free Shipping on orders $49 and up
Elevate your engine's performance with a choice of compression ratios that suit your needs. Opt for stock compression when conducting a basic engine rebuild or for low boost turbo or supercharger applications. If you plan to run high-performance camshafts, added compression can significantly enhance your engine's capabilities. On the other hand, if you're aiming for a big boost turbo setup, low compression is the way to go. CP and this distributor have collaborated closely to bring you the finest pistons for your high-performance or racing engine. These pistons are meticulously crafted to meet the most rigorous standards and are unrivaled in quality. Piston Specifications: BORE: 84.5mm Rod Length: 135mm Compression Ratio: 8.8:1
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VAC Motorsports - Corporate Logo
T#:31158824
Part#: VAC-HPRBK-B58
Ships on Aug 4, 2026
$ 629.99 USD
Free Shipping on orders $49 and up

BMW B58 3.0L VAC Performance Coated Rod Bearing Kit

The BMW B58 3.0L VAC Performance Coated Rod Bearing Kit offers an exceptional upgrade for performance enthusiasts seeking superior reliability and durability. These bearings are crafted with precision and feature a high-quality coating that enhances their performance. Unlike conventional treated bearings, this kit includes a physical coating layer that combines excellent embeddability with dry-lubricant properties, making it ideal for BMW engines.

  • Precision Engineering: Manufactured with high precision and repeatability for optimal performance.
  • Advanced Coating: Features a physical coating layer for superior embeddability and dry-lubricant properties.
  • Enhanced Tolerance: Designed to run well across engine tolerances, reducing typical failures associated with OEM bearings.
  • Improved Cold Starts: Ideal for both street and race engines, providing reliable performance during cold starts.
  • Performance Upgrade: Offers a significant upgrade over OEM bearings, enhancing engine reliability and longevity.
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VAC Motorsports - Corporate Logo
T#:26038609
Part#: JE-FPS-M54
Ships on Aug 4, 2026
$ 1,399.99 USD
Free Shipping on orders $49 and up
VAC Motorsports - Corporate Logo
T#:27705422
Part#: VAC-FCS-S65-G2
Ships on Aug 4, 2026
$ 1,439.99 USD
Free Shipping on orders $49 and up

VAC Motorsports - Corporate Logo
T#:36235571
Part#: VAC-FCS-M60-90-G
Ships on Aug 4, 2026
$ 1,439.99 USD
Free Shipping on orders $49 and up

VAC Motorsports - Corporate Logo
T#:38195383
Part#: VAC-VEK-S50B32
Ships on Aug 4, 2026
$ 629.99 USD
Free Shipping on orders $49 and up
$ 629.99 USD
Free Shipping on orders $49 and up
This unit is designed for the S50B32 Euro Engines ONLY!
VAC Motorsports - Corporate Logo
T#:27705424
Part#: VAC-FCS-S65-G1
Ships on Aug 4, 2026
$ 1,439.99 USD
Free Shipping on orders $49 and up
VAC Motorsports - Corporate Logo
T#:28736798
Part#: CPFPS-N54-84-9.2
Ships on Aug 5, 2026
$ 2,077.99 USD
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