Rinehart Racing RIN-500-1230 4" Slip-On Muffler Chrome w/Black End Cap for Harley-Davidson Harley-Davidson Sport Glide 18-24Description for Rinehart Racing 4" Slip On Mufflers Chrome with Black End Cap 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