Bolt mentioned the parting of ways was not amicable, and he shrugged off the notion that he was now "broke." "I’m not broke, but it’s definitely put a damper on me," he said. "It was for my future.

It’s an axiom of the automotive enthusiast world that you can get big performance gains by using bolt-on parts from the aftermarket. Parts makers sell customized exhaust systems, “cold air” intake ...