40mm Intake / 11

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By reducing wear during cold starts and providing better lubrication under stress

ensuring performance with precise reliability

With an ability to handle up to 2000 horsepower

BMW S38 Valve Springs by SuperTech z4 28i 40mm Intake / 11Supertech delivers this high performance valve spring kit, specifically engineered for the BMW S38B35 and S38B36 engines, offering superior valve control and long lasting reliability. Each kit includes a complete set of precision crafted valve springs and all necessary installation components, ensuring a seamless fit and optimal performance. Designed for the rigors of high performance applications, Supertech valve springs are favored by performance