Comp Cams 743-16 - Comp Cams Conical Valve Springs

The outside diameter at the bottom of each conical valve spring is 1.250", tapering up to 1.454" at the retainer. This is so the valve springs fit into stock unmachined spring pockets yet take advantage of larger diameter retainers. Dyno tested through 10,000,000 cycles with only a 3-pound loss of pressure.