BMW Internal Engine Parts for BMW Z Series E36/7 (1996-2002)

Supertech Upgraded Valve Stem Seal Kit - BMW S54 S52 S50 M54 M52 M50 ...

T#:641030

Part#: VS-VBM6-6CYLKT

In Stock

$ 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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Supertech Performance Exhaust Valve - BMW M50 M52

T#:640219

Part#: BMEVN-1030S

Ships in 8 Business Days

$ 29.99 USD

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$ 29.99 USD

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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 Dual Valve Spring Upgrade Kit w/ Steel Retainers - 80lbs - ...

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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BMW M42 M50 M52 M54 6mm Single Groove Valve Keeper - Set Of 24 ...

T#:21604313

Part#: KPR-6S-7-24

Ships in 5 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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BE Bearings Connecting Rod Bearing Upgrade Set - SP1534F - BMW S54 ...

T#:403644

Part#: SP1534HKSTDS54

Ships on Nov 18, 2026

$ 399.00 USD

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$ 399.00 USD

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NOTE: These bearings are now sold as SP1534F which features a new and improved silver oxide coating that is stronger and more durable! Designed and manufactured by Clevite to BE Bearing specifications. These bearings replace the factory BMW rod bearings. The original BMW bearings have too little clearance, which leads to premature bearing wear and can cause early engine failure. Furthermore, the factory BMW bearings are made from tin-aluminum which are 5-times harder than a softer lead-copper bearing design. A softer bearing is better for your engine and more tolerant of foreign particles suspended in your oil. These BE Bearings feature a state-of-the-art Clevite Tri-Metal design with the Clevite Tri-Armor(tm) coating. Lead-copper design for greater durability and easy tracking with oil analysis like Blackstone (recommended). Designed with extra clearance to "fix" the BMW rod bearing design flaw. Designed for use with factory 10W60 weight oils. Tri-Armor coated for low conditions during cold start Ideal for start-stop vehicles Applicable for BMW engines S54 Standard size Sold as complete set (6-cylinders) Fits the following BMWs: 2002-2006 E46 BMW M3 S54 2002-2003 Z3 BMW M Coupe, M Roadster S54 2006-2008 Z4 BMW M Coupe, M Roadster S54

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Supertech BMW S54 Dual VALVE Spring Kit - E46 M3 Z3M Z4M

T#:7403169

Part#: SPRK-2521-2BM-T1

In Stock at Vendor

$ 1,050.99

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

$ 944.99 USD

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$ 944.99 USD

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Dual valve spring kit to be used with triple groove valves and OEM locks.

Supertech Black Nitrided Intake Valve - +1mm Oversize - Set Of 12 - B...

T#:8549425

Part#: BMIVN-1031S-12

In Stock at Vendor

$ 384.99 USD

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$ 384.99 USD

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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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SuperTech Black Nitrided Exhaust Valve - +1mm Oversize - Single Valv...

T#:640986

Part#: BMEVN-1031S

Ships in 8 Business Days

$ 23.99 USD

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$ 23.99 USD

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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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Supertech Performance Intake Valve - BMW M50 M52

T#:302459

Part#: BMIVN-1030

Ships in 8 Business Days

$ 32.99 USD

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$ 32.99 USD

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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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Cat Cams Upraded Camshafts - 268/268 - 230/230 - 10.45mm/10.45mm - 1....

For non-TU M52B28 (Single VANOS)

T#:28271168

Part#: 1304214

Ships on Dec 3, 2026

$ 1,524.99 USD

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$ 1,524.99 USD

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Cat Cams Camshaft Set - 288/280 12.75mm/12.50mm Lift - E46 M3 With R...

T#:4414885

Part#: 1301805KIT

Special Order: No Guaranteed ETA

$ 4,372.99 USD

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$ 4,372.99 USD

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Made in Belgium, Cat Cams offer great performance at a reasonable price. Cat Cam offers cams in most popular enthusiast upgrade specs to ensure there is a option for what ever your power goal is. The included rocker arm kit consist of: - 24x "CAT031" rocker arm, steel billet, coated - 1x oil connector bridge - rocker arms with 0.5mm oil jet hole towards the cam/follower contact area - rocker arm shafts need to be drilled at each rocker arm (in the groove already present) - rocker arm shafts need to be drilled at oil bridge connector (no need to make extra groove, connector has internal groove) - intake rocker arm shaft needs front plug to close - intake rocker arm shaft has no oil feed so an oil bridge is required to connect the intake/exhaust rocker arm shafts *Please note that the factory cams ave a pressure regulator valve that needs to be removed and installed in the new cams*

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Supertech Black Nitrided Exhaust Valve - Set Of 12 - BMW M50/M52/S50/...

T#:8549426

Part#: BMEVN-1030-12

In Stock at Vendor

$ 358.99 USD

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$ 358.99 USD

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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. Black Nitride Coating Head Diam: 30.50mm Material: Black Nitride Groove Type: Triple Groove Length: 105.65mm Stem Diam: 5.95mm Size: Std

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Supertech BMW M50/M52/S50/S52 Inconel Exhaust Valve - Set Of 12 ...

T#:9126167

Part#: BMEVI-1030S-12

In Stock at Vendor

$ 562.99 USD

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$ 562.99 USD

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The exhaust valves in your vehicle allow the exhaust port to be sealed during the combustion process, so that the engine can run at top efficiency. If the timing belt or lifter breaks, this can cause the piston to come in contact with the valve and bend or break it, causing an improper seal. This will cause a rough idle, misfires, and a check engine light condition. Be sure to replace your bent or broken valve today and keep your engine running strong.

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Supertech BMW M50/M52/S50/S52 Black Nitrided Intake Valve - Set Of 12...

T#:9126168

Part#: BMIVN-1030S-12

In Stock at Vendor

$ 384.99 USD

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$ 384.99 USD

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Generally, an intake valve is the name for a valve that allows air or fluid to pass through it, typically during the intake phase of an engine's operation. In your car, the intake valves allow an air and fuel mixture into the engine's cylinders where it can then be compressed. The valves shut during the compression phase and the spark plug ignites the air and fuel mixture, creating a force that propels the car forward. If these valves aren’t working properly, the engine will create less power and it can damage the engine over time.

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Supertech High Performance Valve Spring Set - E46 M3, MZ3 (S54), MZ4 ...

T#:11760

Part#: TMS11760

Ships in 8 Business Days

$ 1,038.99 USD

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$ 1,038.99 USD

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For BMW's with S54 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:
2001-2006 E46 BMW M3
2001-2002 Z3 BMW M Roadster M Coupe
2006-2008 E85 BMW Z4 M Roadster M Coupe

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SuperTech Black Nitrided Exhaust Valve - +1mm Oversize - Set Of 12 -...

T#:11857222

Part#: BMEVN-1031S-12

Ships in 8 Business Days

$ 322.99 USD

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$ 322.99 USD

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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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Supertech BMW M50/M52/S50/S52 Dual Valve Spring Kit

T#:9126166

Part#: PRK-H1000D-BM

Ships on Nov 6, 2026

$ 763.99 USD

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$ 763.99 USD

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Cat Cams M52B28 Hot Street Camshaft Set

T#:5858417

Part#: 1304213

Special Order: No Guaranteed ETA

$ 1,524.99 USD

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$ 1,524.99 USD

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Upgrade your M52B28 Engine with Cat Cams, a leader in the performance-aftermarket camshaft industry. These Camshafts will increase airflow into the engine by increasing the overall lift and duration over the factory cams. With their Sport cam setup, you can run all factory valvetrain, with no valve spring upgrades necessary! The VANOS (VVT) system on the intake camshaft changes the valve timing: M52 /B28: from 115° to 90° (exhaust: 105° fix) The data are shown for full intake retard (disengaged VVT). Check the distance between valves and piston to be 1mm at least with VVT engaged. Wrong installation will cause severe engine damage! Duration Intake @ .1mm: 257° Exhaust @ .1mm: 257° Intake @ 1mm: 220° Exhaust @ 1mm: 220° Lift Intake: 10.15mm Exhaust: 10.15mm Lobe Angle Intake: 110° Exhaust: 105°

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Cat cams Sport camshaft set 263/256 11.00mm/10.50mm - Z3 1.9 E36 318i...

T#:578599

Part#: 1301712

Special Order: No Guaranteed ETA

$ 1,170.00 USD

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$ 1,170.00 USD

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Made in Belgium, Cat Cams offer great performance at a reasonable price. Cat Cam offers cams in most popular enthusiast upgrade specs to ensure there is a option for what ever your power goal is.

Single Groove Valve Keeper 6mm - Priced Each

T#:3268708

Part#: KPR-6S-7

In Stock

$ 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 6mm Exhaust Valve Stem Seal - Viton - BMW S54 S52 S50 M54 M...

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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Supertech 6mm Intake Valve Stem Seal - Polyacrylic - BMW S54 S52 S50 ...

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 Dual Valve Spring Upgrade Kit w/ Steel Retainers - 67lbs - ...

T#:51426477

Part#: SPRKH100DRBMST

In Stock at Vendor

$ 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 ...

T#:26704985

Part#: KPR-VW6-T

In Stock

$ 1.99 USD

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$ 1.99 USD

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Sport camshaft set 255/248 10.50mm/10.00mm - Z3 1.9 E36 318i ...

T#:578598

Part#: 1301711

Special Order: No Guaranteed ETA

$ 1,170.00 USD

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$ 1,170.00 USD

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Made in Belgium, Cat Cams offer great performance at a reasonable price. Cat Cam offers cams in most popular enthusiast upgrade specs to ensure there is a option for what ever your power goal is.

Cat Cams M52B28 Sport Camshaft Set

T#:25805789

Part#: 1304211

Special Order: No Guaranteed ETA

$ 1,524.99 USD

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$ 1,524.99 USD

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Upgrade your M52B28 Engine with Cat Cams, a leader in the performance-aftermarket camshaft industry. These Camshafts will increase airflow into the engine by increasing the overall lift and duration over the factory cams. With their Sport cam setup, you can run all factory valvetrain, with no valve spring upgrades necessary! The VANOS (VVT) system on the intake camshaft changes the valve timing: M52 /B28: from 115° to 90° (exhaust: 105° fix) The data are shown for full intake retard (disengaged VVT). Check the distance between valves and piston to be 1mm at least with VVT engaged. Wrong installation will cause severe engine damage! Duration Intake @ .1mm: 240° Exhaust @ .1mm: 240° Intake @ 1mm: 203° Exhaust @ 1mm: 203° Lift Intake: 9.25mm Exhaust: 9.25mm Lobe Angle Intake: 110° Exhaust: 105°

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Cat Cams M52B28 Sport Camshaft Set

T#:25805790

Part#: 1304212

Special Order: No Guaranteed ETA

$ 1,524.99 USD

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Qty

$ 1,524.99 USD

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Upgrade your M52B28 Engine with Cat Cams, a leader in the performance-aftermarket camshaft industry. These Camshafts will increase airflow into the engine by increasing the overall lift and duration over the factory cams. With their Sport cam setup, you can run all factory valvetrain, with no valve spring upgrades necessary! The VANOS (VVT) system on the intake camshaft changes the valve timing: M52 /B28: from 115° to 90° (exhaust: 105° fix) The data are shown for full intake retard (disengaged VVT). Check the distance between valves and piston to be 1mm at least with VVT engaged. Wrong installation will cause severe engine damage! Duration Intake @ .1mm: 250° Exhaust @ .1mm: 250° Intake @ 1mm: 213° Exhaust @ 1mm: 213° Lift Intake: 9.55mm Exhaust: 9.55mm Lobe Angle Intake: 110° Exhaust: 105°

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BMW Internal Engine Parts for BMW Z3 (1996-2002)

Sub-Categories

Supertech Upgraded Valve Stem Seal Kit - BMW S54 S52 S50 M54 M52 M50 ...

Supertech Performance Exhaust Valve - BMW M50 M52

SuperTech Dual Valve Spring Upgrade Kit w/ Steel Retainers - 80lbs - ...

BMW M42 M50 M52 M54 6mm Single Groove Valve Keeper - Set Of 24 ...

BE Bearings Connecting Rod Bearing Upgrade Set - SP1534F - BMW S54 ...

Supertech BMW S54 Dual VALVE Spring Kit - E46 M3 Z3M Z4M

Supertech Black Nitrided Intake Valve - +1mm Oversize - Set Of 12 - B...

SuperTech Black Nitrided Exhaust Valve - +1mm Oversize - Single Valv...

Supertech Performance Intake Valve - BMW M50 M52

Cat Cams Upraded Camshafts - 268/268 - 230/230 - 10.45mm/10.45mm - 1....

Cat Cams Camshaft Set - 288/280 12.75mm/12.50mm Lift - E46 M3 With R...

Supertech Black Nitrided Exhaust Valve - Set Of 12 - BMW M50/M52/S50/...

Supertech BMW M50/M52/S50/S52 Inconel Exhaust Valve - Set Of 12 ...

Supertech BMW M50/M52/S50/S52 Black Nitrided Intake Valve - Set Of 12...

Supertech High Performance Valve Spring Set - E46 M3, MZ3 (S54), MZ4 ...

SuperTech Black Nitrided Exhaust Valve - +1mm Oversize - Set Of 12 -...

Supertech BMW M50/M52/S50/S52 Dual Valve Spring Kit

Cat Cams M52B28 Hot Street Camshaft Set

Cat cams Sport camshaft set 263/256 11.00mm/10.50mm - Z3 1.9 E36 318i...

Single Groove Valve Keeper 6mm - Priced Each

Supertech 6mm Exhaust Valve Stem Seal - Viton - BMW S54 S52 S50 M54 M...

Supertech 6mm Intake Valve Stem Seal - Polyacrylic - BMW S54 S52 S50 ...

SuperTech Dual Valve Spring Upgrade Kit w/ Steel Retainers - 67lbs - ...

Valve keeper for Audi/BMW/Opel 6mm stem Triple groove - Supertech ...

Sport camshaft set 255/248 10.50mm/10.00mm - Z3 1.9 E36 318i ...

Cat Cams M52B28 Sport Camshaft Set

Cat Cams M52B28 Sport Camshaft Set

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