Epic Motorsports M50 Race Valvespring Kit

This custom valvespring kit goes far beyond typical "performance" spring kits. Rather than double springs or springs that are much too stiff (and add increased resistance and wear because of it), these are an engineered solution.

Designed for use with the Sunbelt SportCams, this kit was designed with extensive Spintron testing. This ensures the springs apply the correct amount of pressure to keep the valves in contact with the cam lobes, without any unnecessary brute force (less parasitic losses and wear/fatigue). This kit will allow the valvetrain to rev to 9,500 only with Sunbelt cams, but most engines will be bottom-end rev limited well below this level - we suggest a non-sustained maximum limit of 7,400 for 3L and 7,200 for 3.2L engines.

Kit includes valvesprings and retainers. Non-M kit includes appropriate M3 spring seats. Fits all 1992-2000 M50 engine cars, including 323, 325, 328, M3, and Z3.