Catalogue Triumph Balanced Exhaust T120 TR6 1971-1972 Balanced exhaust pipes for Triumph T120 TR6 1971-1972 Made in England from chromed steel tube 1 3/8", Inlet 1 3/8" push into cylinder head, Outlet 1 1/2" OEM 71-2636, 71-2637 (reference only) T84