New valve springs with larger diameters require new retainers to handle the higher pressures developed by the springs. COMP Cams Steel Retainers are the solution. COMP Cams Steel Retainers are precision machined from 4140 chromemoly and finished in black oxide. These precision retainers are specifically designed for positive location when combined with COMP Cams high-quality valve springs. For superior strength and ultimate stability, we offer our 10° retainers and our 10° valve locks.