1.500" Od. 1.120" Id. 10 Degree 11/32 Chromoly Steel Valve Spring Retainers Experience unparalleled performance and power

Experience unparalleled performance and power with Speedmasters 6-71 Complete Supercharger Kitengineered for maximum horsepower and durability

So can features such as full ball-bearing construction

manual or EFI pump

Speedmaster valve locks are wider-angled 10 degree locks

By using an aggressive lobe profile

1.500" Od. 1.120" Id. 10 Degree 11/32 Chromoly Steel Valve Spring Retainers Experience unparalleled performance and powerSpeedmaster chromoly steel retainers are made from 4140 chromoly and then heat treated for long life. These retainers are available in a variety of lock angles and sizes to suit your needs, from performance street to competition use.