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.
A couple of weeks ago, I posted my first impressions of Michelin's PSS vs Firestone Firehawk Indy 500 tires. I've run PSS's for several years on the Boss, but I'm trying the Indy 500's for the first time. In short, I was worried about the narrower tires (I was running 285/35/18 PSS but could only find the Indy 500 in 275/35/18) and tread squirm, but I was happy with them up to that point just driving on the street. I had the chance to drive on them for three track days now. So what were they like? After my first session, they made an impression that basically persisted for the rest of track sessions on them. Phenomenal, unmatched value. Now, if value is something that stands out above all else, it typically means the compromise between qualities you want and those you don't is less than ideal, but the value is attractive. This is no different. I'll start with the bad, which really boil down to two: ultimate grip and grip longevity. Grip is noticeably l...








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