Catalogue Triumph Exhaust 5T 6T Speedtwin Thunderbird Dynamo 1951-1952 Exhaust pipes for Triumph 5T 6T, Speedtwin, Thunderbird 500/600 Dynamo Engine 1951-1952 OEM 70-1519/70-1520 Made in England from chromed steel tube 1 3/4" T41D