canamSVT, it's '100dB' and 'GMC'. Anyway, I'd love a less restrictive exhaust on my wife's picup. Why? Same reason why people do it to performance cars, power. An extra 15ft-lbs of torque always comes in handy. Not for racing, but for pulling its 5000lb weight around, or towing additional 5000lb trailers. More power = good.
As for Harleys with loud exhaust, there are laws in most areas on how loud they can be. Some do it for attention, others power.
