Khrome Werks 4-1/2" HP-Plus® Slip-On Mufflers With Race Tip790618014 Product Description 4 1 2" 16 gauge muffler body Engineered for performance, style, and sound Produce the Khrome Werks signature authoritative tone without annoying high frequency noises These mufflers have been dyno tested and show a 12% increase in torque and 7% increase in power Absorptive baffle wrapped with stainless steel mat and high temp fiberglass Improved torque and horsepower from the hit of the throttle Eclipse style features a