Since it seems this is the one car on the market with zero aftermarket Cat Back options, I created my own. I replaced the worst Y-Pipe ever installed on a vehicle and the 1 1/2” Pipes, Resonators, and Mufflers with 2 1/2” stainless replacements along with nice quad tips. The results are pretty dramatic. The car ran 14.56 at 95.6mph in the quarter mile with stock exhaust. A run today netted a 13.98 at 101mph. Why says that factory knows best.