7.850" Chromoly Heat-Treated 5/16" 0.080" Wall DNA® One-Piece Pushrods short block engines are the

short block engines are the solution to a hassle-free power build

When good looks are important

The Speedmaster shift selector shaft uses an O-ring to prevent leakage from GM TH400 cases

Speedmaster supercharger balancer hub adaptors are designed to fit your balancer so that the belt alignment will be correct

Cast Aluminum Valve Covers

7.850" Chromoly Heat-Treated 5/16" 0.080" Wall DNA® One-Piece Pushrods short block engines are theGet all of the performance that your engine can produce with these durable pushrods designed especially for high lift cams. Speedmaster pushrods are available in both 5 16 in. and 3 8 in. diameters. They feature . 080 in. wall thickness and are formed from 4130 chromoly steel. These one piece Speedmaster pushrods are heat treated for use with guideplates. They have a minimum wall thickness of . 080 in. to handle higher rpm, plus a black oxide finish.