it works pretty nice on the v6 engine, did mine several months ago and I'm very happy with it, my engine now has a nice resonance to it, and it sounds like a v6 now. No extra noise in the interior cabin (which is perfect), but a nice resonance on the exterior at certain rpms. It is nothing like an aftermarket exhaust but it doesn't have the loudness either, just a nice silky smooth sound and a bit more oomph at higher rpms. I think it would sound worse on the 4 cylinder.