Make sure the world knows you're riding a Harley. These 4" slip-on mufflers from Rinehart Racing deliver this isn't no moped sound and great looks to boot. These mufflers were designed for Harley-Davidson Sport Glide motorcycles using the same race-proven baffle design as Rinehart Racing's True Dual Systems, meaning they're precision-machined in America to work with OE head pipes. Large 4" diameter muffler delivers a deep, throaty tone that's mellow at idle and roars to life when you twist the throttle Specially designed baffle prevents reversion and boosts torque for a smooth power delivery all the way through the RPM range Features a matching heat shield for a clean, sleek look that perfectly complements the lines of the bike Accepts 4" Moto Series end caps for a custom look, sold separately