Crane's heat treated tubular steel fuel pump pushrods for Chevrolet "small-block" and "big-block" V-8 engines are centerless ground for concentricity. They are also much lighter than solid steel O. E. type pushrods, while maintaining the strength and stiffness required for reliability in severe usage applications. Part number 11986-1 is for hydraulic and mechanical "cast" type camshafts. Both ends of this pushrod are steel tipped for best wear characteristics in quality for stock engine rebuilds! Part number 11985-1 is specifically for use with 8620 and 9310 steel billet roller and slot hardfaced camshafts. One end of the pushrod has a bronze tip to compatibly bear against the fuel pump eccentric on the camshaft, eliminating the wear problems that occur when using a standard fuel pump pushrod (especially in endurance type applications).Pit Stop USA offers Crane Cams Fuel Pump Pushrod - Steel Tipped - SB Chevy 11986-1 at low everyday prices. Be sure to check out all of our products from Crane Cams including Crane Cams Fuel Pump Pushrods.