− Decrease quantity for Intercooler Pipes, Charge Pipe Kit, Aluminum Pipes, Gunmetal Gray, 4 in. Inlet, 4 in. Outlet, Chevy, GMC, 2500, 3500, 6.6L. Diesel, Each Quantity + Increase quantity for Intercooler Pipes, Charge Pipe Kit, Aluminum Pipes, Gunmetal Gray, 4 in. Inlet, 4 in. Outlet, Chevy, GMC, 2500, 3500, 6.6L. Diesel, Each Add to cart