PPE High Flow Exhaust Manifolds with Up-Pipes-50 State Legal 01-10 Duramax Select Your Year Range & Factory Emmisions:2002-2004 California LB7 aFe performance air filters use

aFe performance air filters use a rounded pleat design which produces a more useable filter surface area for increased flow and greater dust holding capacity

2009 and up the larger 855702-M30X1

and enlarged wastegate chamber for full wastegate travel

Whether you're looking for improved towing performance

PPE High Flow Exhaust Manifolds with Up-Pipes-50 State Legal 01-10 Duramax Select Your Year Range & Factory Emmisions:2002-2004 California LB7 aFe performance air filters useIntroducing high flow performance for your Duramax that is 50 state legal! The factory manifolds and up pipes on the GM Duramax's have several design flaws that reduce potential exhaust flow. One of the larger draw backs is that the drivers side manifold has a large indentation in it for excessive clearance tolerances that is unnecessary. Secondly, the factory up pipes are weak and prone to warping when sustained heat is prevalent. Replacing your