Designed specifically for the Revolution Max 1250 engine, this Adventure Hi-Output 450 muffler from Vance & Hines provides more power and torque than the exhaust that comes standard on the Revolution Max. You can also benefit from up to 6 pounds Baffle with avant-garde design that provides a powerful sound, but at the same time meeting the J2825 decibel level 4-1/2" diameter Slip-On muffler that provides more than 5 HP and 5' lb of torque CNC machined end cap Compatible with saddlebags/cases and center stand of Harley-Davidson® origin Includes all hardware and instructions necessary for assembly Made in the U.S.A.