Improved bottom end and mid range power! You can expect to see better throttle response with this slip-on exhaust. 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. You will see a 4-5 HP Gain! Fits: 2008-2010 700 H1 EFI / 2009-2010 700 Mud Pro EFI / 2008-2010 700H1 TRV