Maybe I am not as sensitive to small changes in performance, but I used to run a K&N air filter and a high-flow cat-back exhaust which was very loud (glasspacks) and I couldn't tell a difference in power between that and the stock setup. Eventually I went back to a normal muffler because the noise was driving me crazy.


2002 Sportage 4dr 4x4 soon to undergo an Extreme Makeover!