The Turbo-A was Toyota's evolution model for the Group A Japanese Touring Car Championship (JTCC) all over the world that required a minimum homologation run of 500 units. The Turbo-A was manufactured for 2 months during the period of September and October 1988 and was available strictly in Japan. Thus the term 88 Spec A. Some notable differences between the standard MA70 Supra 3.0 GT and the Turbo-A model are both cosmetic and mechanical. The standard CT-26 turbo had a slightly larger inducer and can be identified by a stamped "E" on the raised casting on the compressor housing. The Turbo-A had a wide throttle body and accompanied a larger diameter "blank" crossover pipe, instead of the standard 7M-GTE throttle body and original "3000" cast pipe. The Turbo-A also benefited from a larger volume steel air cleaner instead of the factory plastic unit, as well as thicker roll bars and ventilated brake discs all-round.