I have a 01 tahoe drivetrain with a 5.3 installed and am working on the exhaust before i get this thing started. The prbolem i am having is with the passenger side manifold. It is hitting on the egr port near the motor mount plate on the truck. I have ground the manifold down to the point i cant go any more without jeoprodizing the seal of the egr pipe. I can grind the motor mount plate but i dont know if that would be a good idea. It is the plate that the motor mounts bolt to that runs between the crossmember and the frame. Sits at a 45. I am looking for any ideas here but i have to retain all smog compnents. Thanks for the help in advance