Has anyone just went to an exhaust shop to have aftermarket mufflers installed, or have you all done a premade cat back? The best price on the magnaflow catback I have found is about 1200. I can have a local shop install magna flow mufflers and tips for probably less than 500. Are there any dyno tests to show the improvement of the full catback? If it's basically just improved sound I think I'll just save the extra 700 and do mufflers. Thanks.