Khrome Werks HP-Plus 4.5 Race Tip Slip-On Mufflers For Harley Designed for optimal performance, elegance, and acoustics, these mufflers deliver a 12 boost in torque and a 7 rise in horsepower, according to dyno-tests. They emit Khrome Werks' distinct sound, ensuring a powerful presence without high-pitched disturbances. Features: 4-1/2 16-gauge muffler body Absorptive baffle wrapped with stainless steel mat and high-temp fiberglass Improved torque and horsepower from the hit of the throttle Billet aluminum tips can be rotated 360 at 90 increments Eclipse finish is a proprietary, high-temperature black chrome electroplated finish Sold in pairs Made in the USA