Rinehart Racing RIN-500-0503 4" Slip-On Mufflers Black w/Black End Caps for Indian Big Twin 14-Up w/Hard SaddlebagsFrom the world leaders in Touring Slip Ons for V Twin motorcycles comes the 4" Slip On mufflers for Indian Cruiser, Bagger and Touring motorcycles. These Slip Ons utilize Rinehart Racing's distinctive technology to improve performance and sound without requiring any tuning or engine modifications. A deep, warm tone that's louder than stock, but more mellow than our DBX40. 4" mufflers are preferred for rounded top models like the Springfield and the