Improved bottom end and mid range power! You can expect to see better throttle response with this slip-on exaust. Our slip-on exhaust system is 8-9 lbs. lighter than stock! This slip-on features a built-in spark arrestor and uses stock mounting locations and hardware. These silencers run at or below 96 decibels. You will see a 4-5 HP Gain! Kit includes proper jetting!