Myself and others have replied about this subject in prior threads, so a search would help with your questions. Anyway, I installed Hooker Competition 6901-1 long tube ceramic coated headers in the Fastback. These were then connected to the Flowmaster American Thunder 2 1/2" dual exhaust system. These components come to about $640. However, I had a local shop make a couple of short connector pipes to adapt the headers to the Flowmaster H-pipe. This added another $40 to the system. So if you install it yourself, the above system should be less than $700 total. These are top notch components, but it is a little loud.