TRIUMPH VITESSE 6/1600 & 2 LITRE Mk1 ; YEARS 1961-1968. TRIUMPH GT6 Mk1 ; YEARS 1966-1968. TRIUMPH SPITFIRE MkI, II, III, IV & 1500 ; YEARS 1962-1980. This kit is designed to enable you to attach the exhaust downpipe to the manifold without having to use the often very rusty or broken original studs and nuts.