The stock XP800 muffler weighs just shy of 16 lbs. Our Full Velocity Lightweight Muffler weighs only 6.25lbs! Go ahead and have another cheeseburger, this muffler saves the weight for you. You will also notice more throttle response and quicker acceleration, without losing HP like most competitor mufflers do. This muffler actually gains 2 HP peak over stock! Our unique baffle design (never needs to be re-packed) has a nice deep throaty sound without being loud. Easy bolt-on performance!