High performance stock size valve & conical beehive spring kit for street or racing
A drop in kit with no machining necessary. Out-performs others because the springs are approx 1/2 the weight of dual springs and that raises your RPM limit and takes stress & heat off your motor. Cam flex is reduced and saved HP goes to the rear wheel. The conical shape eliminates the need for an inner spring and allows for a smaller lighter retainer. Longer spring length gives you a better linear rate than shorter conical springs. Includes black diamond valves, custom machined stellite tips, beehive springs, titanium spring retainers, spring seats and spring balancing shims. See big valves below (more info).