Cylinder Head

Athena Cut Ring Head Gasket - 84.5mm - BMW M50 M52 (84mm Bore) ...

T#:26171655

Part#: ATH-HG-CR-M50-84

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$ 324.99 USD

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$ 324.99 USD

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Upgrade your BMW engine's performance with the Athena Cut Ring Head Gasket. This gasket replaces BMW part # 11121726619 and 11121726617 and is specifically designed for M50 & M52 iron block inline 6-cylinder engines found in E34/E36 chassis. Standard OEM & MLS gaskets can only handle a certain amount of cylinder pressure before they start to leak, making the Athena Cut Ring Head Gasket the recommended choice for applications making 16+ psi. A compression leak passing the head gasket can cause a range of issues, including engine overheating, loss of power, misfires, and in severe cases, catastrophic engine failure. Athena's gasket is crafted with premium quality reinforced M0115, an asbestos-free material that's original equipment approved and renowned for its superior quality. The AISI 304 stainless steel Cooper Rings bite into the aluminum head, providing maximum sealing capabilities around the cylinder bore and optimizing engine performance, even on engines with nitrous and/or turbo applications that exceed 2-bar boost. Before installation, it is crucial to have the mating surfaces of the cylinder head and block professionally cleaned and resurfaced to ensure they are completely flat. Please be aware that the gasket should have a size that is 0.5mm to 1mm larger than the piston. For example, if the piston measures 84mm, then the gasket should be the next size up, either 84.5mm or 85mm. Installation instructions: Make sure that the engine block and cylinder head surfaces are clean, flat, and free from any debris, oil, or coolant. Install the Cut Ring gasket on the engine block and ensure that it is properly aligned. Avoid twisting or bending the gasket during installation. Place the cylinder head on top of the gasket and install the head bolts or studs in their correct positions. Follow the manufacturer's recommended torque specifications and tighten the bolts or studs in the proper sequence to ensure even clamping force across the gasket. After the initial tightening, re-torque the head bolts or studs after the engine has been started and then allowed to cool to room temperature. This will ensure that the gasket is properly seated and compressed. It is recommended to not use any additional sealant on the MLS gasket, as it is already coated with a Viton rubber sealant. Using additional sealant can hinder the performance of the gasket.

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Ferrea High Performance Valve Spring Kit for BMW N55/S55

T#:23416526

Part#: FER-HPVSK-N55

Ships in 3 Business Days

$ 1,049.99 USD

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$ 1,049.99 USD

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Maximize your N55 or S55 engine's performance with Ferrea Valve Springs and Retainers, precision components crafted from chromoly alloy. These springs undergo special thermal treatment, ensuring exceptional durability even in extreme racing conditions. Addressing issues like valve binding, breakage, and float, Ferrea valve springs are meticulously heat-treated and stress-relieved, providing stability for high-lift and high-RPM racing engines while minimizing load loss. Precision CNC machined titanium retainers offer superior strength and stability. Ferrea's Spring Seat Locators, made from 4140 chromoly alloy, guarantee precise tolerances and a flat, parallel spring pad with a hard Nitride surface treatment for exceptional toughness and anti-wear characteristics. Please note that installation requires the expertise of an engine builder.

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ARP Head Stud Kit - BMW N55/S55

T#:23416542

Part#: ARP-HSK-S56-CA

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$ 999.99 USD

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$ 999.99 USD

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BMW N55 S55 Ferrea High Performance Valve Kit

T#:23416508

Part#: FER-HPVK-S55-T-3

Ships in 3 Business Days

$ 929.99 USD

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$ 929.99 USD

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Increase the power output of your N55/S55 engine with the high-performance Ferrea valve kit. Renowned as the industry's most reliable extreme-duty valves, they're meticulously crafted from aerospace-grade alloys, employing an exclusive two-step slow forging process for optimal grain flow and material structure integrity. A 48-hour heat treatment and stress-relieving process enhance molecular integrity. The valves feature avionics-quality hard chrome and a specially applied hard tip. Standard size: 32mm intake / 28mm exhaust, with a triple groove valve design. Compatible with factory valve locks ("Valve Keepers"), the kit includes 12x Intake Valves and 12x Exhaust Valves for a comprehensive engine upgrade!

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BMW S58 3.0L ARP Head Stud Kit - CA625+

T#:22427036

Part#: ARP-HSK-S58-CA

Ships in 3 Business Days

$ 999.99 USD

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$ 999.99 USD

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BMW S58 3.0L ARP Head Stud Kit - CA625+ is the ultimate upgrade for the BMW S58 engine, specifically designed for high-performance models such as the F97 X3M, F98 X4M, G80 M3, G82 M4, G83 M4, and G87 M2. Manufactured by Turner Motorsport, this head stud kit ensures optimal engine reliability and performance.

Enhanced Strength: Featuring Custom Age 625+ material with a tensile strength of 260 ksi, this kit provides superior strength compared to factory bolts.
Prevents Head and Block Separation: Designed to handle increased boost levels and high-stress conditions, preventing potential head and block separation.
Precision Engineering: ARP’s advanced manufacturing process ensures that these head studs outperform standard factory bolts under extreme conditions.
Ideal for High-Performance Builds: Perfect for enthusiasts pushing the limits of their S58 engines, offering unparalleled durability and reliability.
Direct Fit: Specifically tailored for the turbocharged inline 6-cylinder BMW S58 engine, ensuring a seamless installation and optimal performance.

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Schrick Solid Lifter Conversion Kit (convert Hydraulic Lifters To Sol...

T#:359938

Part#: 086311700KT

Ships on Dec 3, 2026

$ 833.52 USD

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$ 833.52 USD

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One major hurdle for a track-only car is the limitation of the hydraulic valve lifters in the M50, S50-US, M52, S52-US, M52TU, and M54 engines. These effectively limit your revs to 7200-7300 RPM as the valves 'float' at higher revs, leading to piston-valve contact. By converting to a machined solid lifter, and upgrading other areas of the engine, you can configure the valve train to withstand high RPM running. Not only can you tune for more power, you can help prevent damage during a mild mechanical over-rev.

This kit includes the mechanical spacers to convert hydraulic lifter tappets to solid lifters. The lifter bucket remains in place with the Schrick solid tappet replacing the original. These work on all M50, M52, S50, S52 and M54 engines and were proven in normally aspirated as well as supercharged engines. A custom camshaft is required.

Professional installation and setup is mandatory as these require complete assembly of the head, checking valve lash, then dis-assembly and machining of the Schrick tappet to spec. This kit includes enough spacers for 24 valves. We also carry individual parts, if you are looking for single pieces. This price is for a full set of 24.

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OEM Ina Intake Hydraulic Tappet - BMW N52 N54 N55 N20 S55

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T#:591661

Part#: 11337548690

In Stock

$ 15.99 USD

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$ 15.99 USD

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Hydraulic valve lifter

OEM INA Hydraulic Lifter - BMW M5X S5X M62 S62

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T#:360996

Part#: 11321748884

In Stock

$ 19.99 USD

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$ 19.99 USD

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Stock replacement hydraulic valve lifter for the M52, M54 and S50 S52 engines. These lifter buckets can last 150,000+ miles but then they no longer fit on the valve stem correctly and a ticking or knocking noise can result. If the lifter is no longer seated correctly, it can lead to the valve not opening correctly. Replacement is straight-forward but requires special tools for working with the camshafts. This item fits the following BMWs:
1995-1998 E36 BMW 323is 323ic 328i 328is 328ic M3
1997-2003 E39 BMW 525i 528i 530i M5
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
2004-2005 E60 BMW 525i 530i
2004-2005 E83 BMW X3 2.5i X3 3.0i
2000-2006 E53 BMW X5 3.0i
1996-2002 E36/7 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
1998-2000 E36/7 BMW M Roadster M Coupe

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Ina Hydraulic Valve Lifter - E60 E61 E82 E88 E90 E91 E92 E93 F10 Z4 E...

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T#:596290

Part#: 11337605330

In Stock

$ 9.99 USD

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$ 9.99 USD

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If your BMW has noisy or stuck lifters, replace them to improve performance and stop the annoying chatter

Ferrea High Performance Oversized Valve Kit - S58

T#:22427041

Part#: FER-HPVK-S58+

Ships in 3 Business Days

$ 999.99 USD

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$ 999.99 USD

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Elevate the performance of your S58 engine with Ferrea's valve kit. Renowned for their unmatched reliability and durability in extreme conditions. Crafted from aerospace-grade alloys, including the robust EV8-Z18, these valves undergo a meticulous two-step slow forging process to ensure optimal grain flow and minimize material structure damage. Maintaining molecular integrity is paramount, achieved through a rigorous 48-hour heat treatment and stress-relieving process. The valves boast avionics-quality hard chrome and a specially applied hard tip for enhanced performance. Featuring a standard size of 30.1mm for intake and 28.5mm for exhaust, their triple groove design ensures top-notch efficiency. Note that these valves require additional machining due to their overall larger diameter. The kit includes: 12x Intake Valves 12x Exhaust Valves Designed to seamlessly work with factory valve locks, Ferrea's valves are tailored to elevate your BMW S58 engine's performance to new heights.

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OEM INA Rocker Arm - BMW N20 2.0L, N52 N54 3.0L

T#:41492602

Part#: 11337559797

In Stock

$ 22.99 USD

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$ 22.99 USD

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Rocker arms work in conjunction with your camshafts and valves, applying pressure from the camshaft to open and close your intake and exhaust valves. If your rocker arm rollers have failed, this can lead to extreme camshaft damage, requiring the camshaft to be replaced. Replace your rockers whenever servicing your camshafts or replacing your hydraulic lifters to ensure long-term engine reliability.

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Ferrea High Performance Valve Spring Kit - S58

T#:22427042

Part#: FER-HPVSK-S58

Ships in 3 Business Days

$ 1,099.99 USD

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$ 1,099.99 USD

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Discover the Ferrea Valve Spring Kit for BMW S58 Engines Key Features: Premium Construction: Crafted from premium chrome-silicon steel wire, ensuring precise valve control at high engine speeds. Lightweight Durability: Titanium retainers enhance engine speed and reduce the risk of valve float. Engine-Specific Design: Spring seats are expertly tailored for your specific engine application, providing optimal support for the valve springs. Please note that while this kit is ideal for high-performance racing scenarios, its installation should be handled by experienced professionals to ensure proper operation. Seek expert guidance for a seamless installation and optimal performance.

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Athena Cut Ring Head Gasket S14

T#:28537477

Part#: ATH-HG-CR-S14-95

Ships in 3 Business Days

$ 284.99 USD

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$ 284.99 USD

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This Athena Cut Ring Head Gasket is specifically engineered to replace BMW part 11121316714 for the S14B20, S14B23, S14B25, S14B27 engines found in the E30 M3. Factory OEM & MLS head gaskets are only engineered to handle a limited amount of cylinder pressures before they start to leak, causing a range of issues, including engine overheating, loss of power, misfires, and in severe cases, catastrophic engine failure. Athena-SCE Cut Ring Head Gaskets are uniquely designed to handle increased cylinder pressure caused by power modifications, making them the recommended choice for applications making 16+ psi. Design: Athena-SCE's gasket body is composed of Motorgasket, a reinforced material developed by Athena's R&D department. This consists of a steel core covered with two layers of asbestos-free aramid fibre and offers excellent thermal and mechanical resistance without compromising its ability to adapt to mating surfaces. To ensure maximum sealing under all conditions, a silicone bead is also applied to critical sealing areas, such as oil and coolant passages. The AISI 304 stainless steel cooper rings bite into the aluminum head, providing maximum sealing around the cylinder bore and optimizing engine performance, even on engines with nitrous and/or turbo applications that exceed 2 bar boost.

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SuperTech High Performance Valve Spring Kit 75lbs - S58

T#:22427032

Part#: SUP-HPVSK-S58-75

Ships in 3 Business Days

$ 999.99 USD

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$ 999.99 USD

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Upgrade your BMW S58 with Supertech's specialized valve spring kits, designed for enhanced control and reliability. Engineered for high-performance demands, these kits are favored by enthusiasts, engine builders, and race teams alike. Crafted from premium materials, the springs offer superior rates, improved valve control, and enhanced durability compared to stock alternatives. Tailored to specific BMW engine configurations, Supertech kits ensure proper valve operation, preventing float and maximizing power output without compromising reliability.

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SuperTech High Performance Oversized Valve Kit - S58

T#:22427039

Part#: SUP-HPVK-S58+

Ships in 3 Business Days

$ 1,099.99 USD

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$ 1,099.99 USD

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Elevate the performance of your S58 engine with Supertech's oversized valve kit, celebrated for its unmatched reliability and durability even in the most trying conditions. Boasting a size of 31.1mm for intake and 29.5mm for exhaust, their triple groove design ensures unparalleled efficiency. It's worth noting that these valves, being larger in diameter, necessitate additional machining. Included in this kit: 12x Intake Valves 12x Exhaust Valves

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SuperTech High Performance Valve Kit - S58

T#:22427038

Part#: SUP-HPVK-S58

Ships in 3 Business Days

$ 1,099.99 USD

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$ 1,099.99 USD

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SuperTech High Performance Valve Spring Kit 84 Lbs - S58

T#:22427033

Part#: SUP-HPVSK-S58-84

Ships in 3 Business Days

$ 999.99 USD

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$ 999.99 USD

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Upgrade your BMW S58 with Supertech's specialized valve spring kits, designed for enhanced control and reliability. Engineered for high-performance demands, these kits are favored by enthusiasts, engine builders, and race teams alike. Crafted from premium materials, the springs offer superior rates, improved valve control, and enhanced durability compared to stock alternatives. Tailored to specific BMW engine configurations, Supertech kits ensure proper valve operation, preventing float and maximizing power output without compromising reliability.

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