BMW S54 Valve Springs by SuperTech

Designed specifically for BMW S54 engines, Supertech high-performance valve springs are engineered to deliver exceptional performance and reliability at high RPMs. Made from a premium Superclean Chrome Silicon Vanadium Steel alloy, these springs provide superior strength and longevity, ensuring your engine performs optimally even in demanding conditions. Each valve spring is meticulously crafted using advanced computer-aided design, allowing for precise management of wire stress levels to remain well within defined fatigue limits. Supertech's innovative approach also incorporates sophisticated software to control harmonics, further enhancing the durability of the springs. With these features, Supertech valve springs give your racing engine a distinct advantage in both power and endurance. Accompanying the valve springs, Supertech retainers are constructed from military-grade Titanium alloy and CNC machined for a perfect fit. Known for their unparalleled quality, these retainers are among the best available, making them an essential addition to your performance upgrade.  Installation requires the expertise of an engine builder. Options:  #1 - 82 lbs Single Groove Valves and Keepers  SPRK-2521-2BM-T1 Seat Pressure: 82lbs@41mm Open Pressure: 186lbs@10mm Max Lift: 14.5mm Coil Bind: 24.50mm Rate: 10mm Kit spring: SPR-2521/2 Kit spring qty: 24 Retainer: RET-BM2521/T1 Retainer qty: 24 InnSpr.ID: 14.5mm InnSpr.OD: 19.3mm OutSpr.OD: 26.4mm OutSpr.ID: 19.3mm #2 - 82 lbs to work with Triple Groove Valves and Keepers SPRK-2521-2BM-ST Seat Pressure: 82lbs@41mm Open Pressure: 186lbs@10mm Max Lift: 14.5mm Coil Bind: 24.50mm InnSpr.ID: 14.5mm Rate: 10mm Kit spring: SPR-2521/2 Kit spring qty: 24 Retainer: RET-BM2521/T2 Retainer qty: 24 InnSpr.OD: 19.3mm OutSpr.OD: 26.4mm OutSpr.ID: 19.3mm Seat Locator: SEAT-BMS55 Seat Locator: SEAT-BMS54 #3 - 82 lbs to work with Single Groove Lash Cap Design Valves and keepers SPRK-2521-2BM-T1S-LC Seat Pressure: 82lbs@41mm Open Pressure: 186lbs@10mm Max Lift: 14.5mm Coil Bind: 24.50mm Rate: 10mm Kit spring: SPR-2521/2 Kit spring qty: 24 Retainer: RET-BM2521/T1S-LC Retainer qty: 24 InnSpr.ID: 14.5mm InnSpr.OD: 19.3mm OutSpr.OD: 26.4mm OutSpr.ID: 19.3mm Seat Locator: SEAT-BMS54 BMW S54 Applications: BMW 3 Series 2000-2006     E46     M3 BMW Z3 Series 2001-2002     Z3     M BMW Z4 Series 2006-2008     Z4     M