4-1/2" HP-Plus® Slip-On Mufflers with Race Tip - Chrome - Twin Cam

4-1/2" 16-gauge muffler body 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 Engineered for performance, style, and sound Produce the Khrome Werks signature authoritative tone without annoying high-frequency noises Improved torque and horsepower from the hit of the throttle Billet aluminum tips can be rotated 360° at 90° increments Optional performance inserts boost low-end performance and enhance sound Bolt-in optional inserts available that comply with SAE J2825 sound test with no appreciable loss of performance Sold in pairs Made in the U.S.A.