Catalogue Triumph Exhaust TR6 T120 Unit 1963-64 Exhaust pipes for Triumph TR6 T120 6T T110 Unit Construction1963-1966 Made in EnglandĀ from chromed steel tube size 1 1/2" Inlet 1 3/4" cup over the cylinder head OEM 70-4716 70-4718 (reference only) T63