KHROME WERKS 1801-1822 201930 4-1/2" HP-Plus® Slip-On Mufflers with Klassic Tip - Eclipse® - M8Features These mufflers have been dyno tested and show a 12% increase in torque and 7% increase in power Produce the Khrome Werks signature authoritative tone without annoying high frequency noises Engineered for performance, style, and sound 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