Edelbrock part #9647 Pushrods are designed for big-block Chevy V-8 engine applications. These one-piece pushrods are manufactured from high quality 4130 Chromoly steel tubing that has been surface hardened for maximum durability. They have precise formed wedged ends for a high quality fit with the cup seats. A black oxide finish is added for corrosion resistance. Pushrod Specifications: - For use with Edelbrock hydraulic roller lifters #97433 - Outside Diameter: 3/8" - Length: 7.800"/8.800"