As promised, here's a video comparing the stock axle backs to the Heartthrob Flowpack units I installed a few weeks ago. The video shows start ups, both cold, and a few revs after the car had warmed up. The video doesn't do the difference in volume justice but you can tell the difference in tone with a good set of headphones or speakers. For a full review, go the original post: 2012 Mustang Boss 302 - Heartthrob Flowpack Axle Back Exhaust.
2012 Boss 302 on square 305/30/19 RE-71R's at AMP - Graham MacNeil © For better or for worse, I have heard and read so much about RE-71R's. Everyone swears by the grip but complains about the wear. Generally speaking, the pros are: 1. They grip as well or better than most R comps. 2. They don't wear as quickly as R comps if driven occasionally on the street. 3. They work better in the rain than R comps. The cons were limited to overheating quickly when used on track (being an autocross tire) and wearing too fast on heavy cars like mine. In the popular 200 TW category, they are faster than the popular Hankook RS-4's and BFGoodrich Rival S's according to published Tire Rack Tests. According to plenty of reviews, they are also faster than well established R comps like R888R's (which don't seem to work too well on heavy cars anyway) and the venerable NT01's. But I was still hesitant for a while until I talked to a tire tech support gentleman...








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