MSHarnett said:IMO its not worth buying those setups. I say just buy a muffler or even just a straight pipe if you want real noise. Besides, your 2006 already has 4" pipe from the turbo, its not really going to make that much of a diffrence with anything bigger from the cat. Many here prefer the MBRP mufflers though. I have a Banks for the winter and straight for the summer.