New BSA Unit Singles Chrome Muffler Silencer. This EMGO Muffler is perfect for your “Everyday Rider” or your “Refurbishment” Project! Comes with a Lovely Chrome Finish & Build Quality! Accepts the O.E.M. Brackets to Mount it to your frame. Measures 25″ in Total Length, with a 1 3/8″ I.D. on both sides.Fits all Road Model BSA Unit Singles (Starfire, B25, C25, Shooting Star, Etc) from 1967-1970 only. Please refer to your parts catalog for proper fitment.Please note that this muffler will also fit the Triumph TR25W Trophy from 1967-1970 if you have the proper brackets as fitted to the BSA C25 / B25 & B44SS models..Made by EMGOO.E.M Part number is 40-2841