I already bought Flowmaster American Thunders for my 06 GT. Im looking to completly replace the exhaust from the headers back. But keep it emissions legal by having high performance cats. I was thinking of getting the FRPP Headers and the Bassani 3 piece exhuast with x pipe. What do you guys think?

 

I have the Bassani X with cats going back to Magnaflow axle backs and it sounds great! I think you'll like it.

 

I'd go with the shortie headers, and an high flow H-Pipe, give it that american muscle car rumble sound coming out of the flowmasters.