7/16 Inch Competition & Race Performance Pushrods 2001-2016 GM 6.6L Duramax XD316 XDPRestore lost power from the valvetrain in your 2001 2016 GM 6. 6L Duramax with the XDP Pushrods 7 16 inch Competition & Race Performance XD316. The factory pushrods in your Duramax engine are not adequate to handle the stress from your modified engine. Increased cylinder pressures, higher engine RPM, and increased valve spring pressures can quickly max out the material strength of your originally equipped pushrods. In most instances you won't see