Fitment：For Predator 196cc 212cc For Honda GX160 GX200 Go Kart OHV Racing Motor Engine Hemi Non-Hemi . Package Includes:2Pc 26 lb valve springs These springs will provide extra performance at over 7000RPM. Length and Rate Tolerance will vary from spring to spring. Product performance upgrade, can withstand greater pressure, in the case of maintaining high speed, can also be a good control of the valve, and reduce wear, effectively reduce the fault situation.