1972-2013 GM K1500 8.5"-10 Heavy-Duty Aluminum Rear Differential Cover-138051300 LB7 Duramax " 2004-2005 (Build Date 9/29/03-11/3/04) Engine

2004-2005 (Build Date 9/29/03-11/3/04) Engine Serial Numbers 6155637 - 6344932

DODGE (2003-up) with AA14-11

Smooth plenum expansion creates signature performance inline-6 appearance

Comes complete with a safety wire provision and a copper washer for a tight seal

Comes with filter head

1972-2013 GM K1500 8.5"-10 Heavy-Duty Aluminum Rear Differential Cover-138051300 LB7 Duramax " 2004-2005 (Build Date 9/29/03-11/3/04) EngineKeep your GM rear differential running cool and clean with an upgraded cover from PPE. Made from thick, high quality A356. 0 T6 cast aluminum for strength and optimum heat dissipation. The beefy PPE differential cover is equipped with internal heat sinks and external cooling fins which increase the pans surface area as well as thermal stamina. It keeps your differential oil running within its ideal viscosity range, helping extend differential service