Khrome Werks 4-1/2" HP-Plus® Slip-On Mufflers With Klassic Tip - Eclipse® - M8746026445 Product Description 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