The Kawasaki Teryxâ„¢ Teryx4™ exhaust by HMF is available as a slip-on system in the Titan series. Without any special tuning the exhaust by itself picks up 1-2 hp through the power curve. With a Power Commander V installed with our specifically developed map, we were able to gain an average of 5 hp and 4 ft-lbs of torque through the power curve. The Titan-XL is roughly 4-6 dB louder than stock at idle while the Titan-QS is 1-2 db louder. Both the Titan-XL and Titan-QS weigh significantly less than the stock muffler.