8.700" Chromoly Heat-Treated 3/8" 0.080" Wall DNA® One-Piece Pushrods Convert any one-piece GM TH400

Convert any one-piece GM TH400 case into a two-piece case with our Speedmaster TH400 case adapter

with the performance and durability required to reach the winner's circle

the Speedmaster piston oil ring spacers will keep your pistons working smoothly throughout the entire operating range

They feature aluminum construction and provide double rate cooling due to the double pass design

8.700" Chromoly Heat-Treated 3/8" 0.080" Wall DNA® One-Piece Pushrods Convert any one-piece GM TH400Get 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.