Exhaust Manifold
Has anyone changed the lefthand Exhaust manifold on their Duramax for an aftermarket one without the clearence for steering column shaft? Am being told that the factory manifold flows 20% less with this indentation than the other side, and that it is not necesary.
84 GMC Sierra Classic 6.2, 2WD reg cab
98 GMC Sierra Z71 6.5 TD (SOLD)
2007 GMC Sierra Classic EC 2500 LBZ, Cognito leveling kit, Rancho RS9000X shocks, JJ Nerf Boards.
Firestone Air bags, 285 Mickey Thompson Baja MTZ tires. 8' Aluminum Marathon Sled Deck.