The sound? Wicked. The chrome? Wicked. The diffusion discs? Extra wicked. My only regret is waiting on the install. The bike is much more fun to ride now. There is more than one way to skin a cat, and in this case, multiple air cleaner options, too. Chrome, black, round, cone, oval, or decorative cover. I kept it simple. Stock Horsepower Modified Horsepower Stock Torque Modified Torque A 4-bhp gain isn’t much, but it feels like a completely different bike. A 0.5 lb.-ft. increase in torque is negligible, but that smooth line is improved rideabilty.