I am really wanting to figured out what kind of exhaust to get on my car and my first question is that if I buy a aftermarket exhaust is this in some way going to void my warranty???? because if it is I will just get mazdaspeed... then if not then which exhaust would be the best performance wise??? Greddy HKS and Agency power titanium exhaust.... I called about the HKS and they said that it was 2.5 inches around thats not counting the tips, the Agency power is 3 inch around and its partial titanium... I was wondering does it mean the wider the better or what??? I am really confused on buying a exhaust and I really would love some help so please help me out on the best decision... Thank you :wavey:

You're not going to get much out of the exhaust with any system, except maybe the TurboXS. I think you should decide which looks the best to you, and what sound you like out of the 3. That should be your choice. Unfortunately, there is no miracle exhaust system for this car.

Hks Woot Woot!!