aFe Power 49-02054NM ATLAS 4" Aluminized Steel Turbo-Back Exhaust System Constructed of 4" mandrel-bent aluminized steel tubing for maximum flow Includes a muffler delete pipe for a more aggressive sound Does not include tip Fits Rear Coil and Leaf Spring Suspensions This is a "Race Only" product used solely for competition; Its use is limited to closed-course and open-course racing that is formally sanctioned by a recognized racing organization