1999-2004 Jeep Grand Cherokee WJ Mid-Pipes

The section of exhaust running between the catalytic converter and the muffler on the WJ is one of the places the factory left the most restriction, and fixing it without touching the rest of the system still makes a noticeable difference. That's what 1999-2004 Jeep Grand Cherokee WJ Mid-Pipes address, improving flow through a section that feeds directly into whatever muffler or cat-back is downstream.

 

Diameter matters more here than almost anywhere else in the system since a mid-pipe that's undersized relative to the cat-back creates a restriction that undoes whatever gains the downstream hardware was supposed to deliver. Mandrel bending preserves the inside diameter through the bends in a way that crush-bent alternatives don't, which is relevant given the tight routing the WJ's exhaust path requires.

 

The exhaust conversation on the WJ is a longer one, and 1999-2004 Jeep Grand Cherokee WJ Mid-Pipes are one essential piece of it. Cat-back system options that pick up where the mid-pipe ends are at 1999-2004 Jeep Grand Cherokee WJ Cat-Back Exhaust, and header options that feed into the mid-pipe from the front are at 1999-2004 Jeep Grand Cherokee WJ Headers. The full exhaust category covering everything on the WJ is at 1999-2004 Jeep Grand Cherokee WJ Exhaust.