Heavy duty Maxxspool 4340 chromoly pushrods with billet ends. A must for high-rpm, high hp engines! Standard length. MaxSpool Engineering offers you the ultimate pushrod line up for your diesel engine program . The pushrod is one of the most important members of the valve train, but can be the most overlooked Through extensive research and testing , including countless hours on a SpinTron¿, we have learned that not only does the pushrod have to be strong enough not to fail, bend or burn up at the ends, the frequency of the pushrod must also match that of the rest of the parts in the valve train, as well as the RPM at which the engine will be run. These , precision formed pushrods with billet ends , are constructed from SAE 4130 chrome-moly tubing, centerless round to exacting tolerances, and case hardened to Rc 60, Black oxide finish Laser etched length Please select the correct year truck to ensure the correct item is sent to you.