Designed specifically for the Revolution Max 1250 motor, the Vance & Hines Adventure Hi-Output 450 delivers a strong increase in horsepower and torque versus the bike's stock Revolution Max exhaust system while reducing overall weight of the exhaust by approximately 6 lbCutting-edge baffle design delivering bold rumble while meeting J2825 decibel levels4-1/2'' diameter slip-on delivers over 5 hp and 5' lb torqueCNC-machined billet end capCompatible with Harley-Davidson® factory saddlebags and centerstandAll necessary instructions and hardware includedMade in the U.S.A.