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Cylinder Head Hardware & Misc Components

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Supertech Valve Spring Kit - BMW S65 Engine
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Supertech - Corporate Logo
T#:4908057
Part#: ST-VSK-S65
Ships in 7 Business Days
$ 469.99 USD
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$ 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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Ferrea High Performance Valve Spring Kit for BMW N55/S55
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5150 Autosport - Corporate Logo
T#:23416526
Part#: FER-HPVSK-N55
Ships in 3 Business Days
$ 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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BMW N54 ARP Head Stud Kit
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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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BMW N55 S55 Ferrea High Performance Valve Kit
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5150 Autosport - Corporate Logo
T#:23416508
Part#: FER-HPVK-S55-T-3
Ships in 3 Business Days
$ 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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ARP Head Stud Kit - N63
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ARP - Corporate Logo
T#:26238387
Part#: ARP-HSK-N63
Ships in 3 Business Days
Starting at $ 749.99 USD
Free Shipping on orders $49 and up
Starting at $ 749.99 USD
Free Shipping on orders $49 and up
Upgrade the performance of your BMW N63 engine with our ARP Head Stud Kits, specifically designed for the turbocharged V-8 N63 engine. As you increase the power output of your engine beyond its factory specifications, the head and block may start to separate, causing factory bolts to stretch and fail. Our ARP Head Studs are designed to be stronger than factory bolts, ensuring your race engine stays together even under extreme conditions. Our Custom Age 625+ kit is made from a material with a tensile strength of 260 ksi, substantially higher than the 190 ksi of the ARP 2000 head stud. It's an ideal choice for individuals who want to push the limits of their N63 builds.
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BMW S58 3.0L ARP Head Stud Kit - CA625+
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5150 Autosport - Corporate Logo
T#:22427036
Part#: ARP-HSK-S58-CA
Ships in 3 Business Days
$ 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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HEAD STUD KIT - BMW S85
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ARP - Corporate Logo
T#:20089537
Part#: ARP-HSK-S85
Ships in 5 Business Days
$ 579.99 USD
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5mm Single groove valve lock conversion
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Supertech - Corporate Logo
T#:30330952
Part#: KPR-5.0/7S
In Stock
$ 3.99 USD
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Ferrea High Performance Oversized Valve Kit - S58
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5150 Autosport - Corporate Logo
T#:22427041
Part#: FER-HPVK-S58+
Ships in 3 Business Days
$ 999.99 USD
Free Shipping on orders $49 and up
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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Ferrea High Performance Valve Spring Kit - S58
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5150 Autosport - Corporate Logo
T#:22427042
Part#: FER-HPVSK-S58
Ships in 3 Business Days
$ 1,099.99 USD
Free Shipping on orders $49 and up
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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SuperTech High Performance Valve Spring Kit 75lbs - S58
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5150 Autosport - Corporate Logo
T#:22427032
Part#: SUP-HPVSK-S58-75
Ships in 3 Business Days
$ 999.99 USD
Free Shipping on orders $49 and up
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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Ferrea High Performance Valve Kit - S58
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5150 Autosport - Corporate Logo
T#:22427040
Part#: FER-HPVK-S58
Ships in 3 Business Days
$ 999.99 USD
Free Shipping on orders $49 and up


SuperTech High Performance Valve Spring Kit 84 Lbs - S58
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5150 Autosport - Corporate Logo
T#:22427033
Part#: SUP-HPVSK-S58-84
Ships in 3 Business Days
$ 999.99 USD
Free Shipping on orders $49 and up
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 Valve Kit - S58
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5150 Autosport - Corporate Logo
T#:22427038
Part#: SUP-HPVK-S58
Ships in 3 Business Days
$ 1,099.99 USD
Free Shipping on orders $49 and up
SuperTech High Performance Oversized Valve Kit - S58
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5150 Autosport - Corporate Logo
T#:22427039
Part#: SUP-HPVK-S58+
Ships in 3 Business Days
$ 1,099.99 USD
Free Shipping on orders $49 and up
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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MINI W10 W11 Performance Valve Springs Kit - Single Groove SPRK-HM100...
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Supertech - Corporate Logo
T#:29002074
Part#: SPRK-HM1007BE/MC
Ships in 8 Business Days
$ 768.99 USD
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Upgrade Your Mini's Engine Performance with MINI W10 W11 Performance Valve Springs Kit - Single Groove SPRK-HM1007BE/MC2 SPR-HM1007BE/MC2

Enhance your Mini's engine performance with the MINI W10 W11 Performance Valve Springs Kit - Single Groove SPRK-HM1007BE/MC2 SPR-HM1007BE/MC2. This comprehensive kit is designed to optimize valve operation and improve engine efficiency. With high-quality materials and precision engineering, it ensures durability and reliability for your Mini's engine.

Benefits:

  • Optimizes valve operation for improved engine performance
  • High-quality materials ensure durability and reliability
  • Precision engineering for enhanced engine efficiency
  • Compatible with Mini W10 and W11 engines
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Titanium Retainers - Set Of 8 - BMW B48 - Intake Side
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Supertech - Corporate Logo
T#:54388410
Part#: RET-BMB48-TI-8
Ships in 8 Business Days
New Item
$ 145.99 USD
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By minimizing moving weight, these retainers help prevent valve float at extended RPM ranges, ensuring your engine maintains precise timing and peak power delivery under the most demanding track conditions.
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E12 Torx BMW Head Bolt Socket
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CTA Tools - Corporate Logo
T#:640255
Part#: CTA9259
Ships on Jul 28, 2026
$ 14.27 USD
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Used for cylinder head bolts on BMW M42 and M50 engines. 1/2" square drive with 6" (15cm) shaft

5mm Single groove valve lock conversion (SET OF 16)
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Supertech - Corporate Logo
T#:51356057
Part#: KPR-5.0-7S-16
Special Order: No Guaranteed ETA
New Item
$ 60.99 USD
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