For C15 250 cc models. OEM part number 67-0101.
40-2710 BSA C15 B25 B40 250 350 1 3/8" FINNED EXHAUST CLAMP & SCREW UK MADE
BSA C15 B40 Motorcycle Manual 250 Star C15T C15S Star Distributor Model 1959-62
BSA C15 STAR & C15 SPORTS STAR ORIGINAL FACTORY PARTS CATALOGUE
BSA Plain Clutch Plated Set Of 5 57-2725 BSA C15 B25 B40 B44 B50, Triumph TR25
BSA Plain Clutch Plates Set Of 4 57-2725 BSA C15 B25 B40 B44 B50, Triumph TR25