Catalogue Triumph Balanced Exhaust T120 TR6 1969-1970, Balanced exhaust pipes for Triumph T120 TR6 1969-1970 OEM 70-9363, 70-9364 (reference only) Made in England from chromed steel tube 1 3/8", Inlet 1 3/4" cup over cylinder head, Outlet 1 1/2" T77