In gearhead heaven (or maybe it's hell), everybody would drive around with open headers. In the real world, laws and the basic demands of civility dictate we have exhaust systems on our cars. So how ...

Figuring that indicates interest in hot-rodding those cars, we acquired a '01 Camaro with a 3.8L V-6 five-speed manual powertrain and tried a few mods. The first was Flowmaster's new American Thunder ...