These new premium COMP CAMS BRONZE TIP fuel pump pushrods are designed for use with billet roller cams. They are made from hollow 4130 Chrome Moly steel which then has heat treated tips pressed in and is black coated for durability. This process allows for over a 30% weight savings compared to stock replacement type pushrods, which are made from a solid steel bar. This model features a BRONZE tip, and is designed to be used with 8620 ROLLER CAMSHAFTS ONLY. We carry a different version with steel tips for use with regular iron cams. If you're looking for the best there is in the Big Block Mopar fuel pump pushrod department, this is it. This is a premium USA made item from COMP CAMS. Nothing else on the market has the durability and weight savings of this piece.