EMGO Chrome Wide Mouth Megaphone Muffler 26&Prime, Long 80-84013 Megaphone muffler is 26in. L; Megaphone wide-mouth is 24in. L Shorty muffler measures 12in. L Turn-out muffler is 19in. L and fits 1 3/4in. and 1 1/2in. pipes Dunstall-replica mufflers available in wide-mouth outlet (27 1/4in. L) or reverse-cone style (27 3/4in. L) BMW replica mufflers are replica of OEM mufflers and fit 1970 and later twins