Edelbrock part #9648 Pushrods are designed for Chevy 348/409 W series 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 precis Product Features:8.3 in./ 8.75 in. Length0.375 in. Diameter4130 Chromoly Steel MaterialBlack Oxide FinishMade In The USA