Toyota Motor Corporation's M family of engines were a longitudinally mounted straight-6 engine design. They were used from the 1960s through the 1990s. All M family engines were OHC designs. While the M family was born with a chain-driven single camshaft it evolved into a belt-driven DOHC system after 1980. All M family engines used a cast-iron block with an aluminum cylinder head, and were built at the Toyota Kamigo plant in Toyota City, Japan. The M-E variant, available only in the Japanese domestic market, was the first Toyota engine to be equipped with fuel injection (around the same time as the 4-cylinder 18R-E). The 4M-E was the first Toyota engine to be equipped with fuel injection for non-Japanese markets. The M family were Toyota's most prestigious engines (apart from the uncommon V family V8) for over 30 years. They were commonly found on the large Toyota Crown, Mark II, and Supra models. M The first M was a version produced from 1965 through 1988. It was a 2-valve SOHC engine. Cylinder bore and stroke was square at . Output was at 5,200 to 5600 rpm, depending on specifications and model year. Typical torque is at 3,800 rpm. The "M-C" engine, for commercial vehicles such as the Crown Van produces . Twin sidedraft SU Carburettors pushed output for the M-B and M-D to at 5,800 rpm. Anti emissions versions, the M-U and M-EU, replaced the M and M-E on the Japanese market in mid 1976. The emissions system was called TTC (Toyota Total Clean), with a "-C" to denote the installation of a catalytic converter. For commercial vehicles, the emissions controlled carburetted version was called the M-J. Applications (calendar years): 1962–1967 Toyota Crown MS40 (second generation) 1967–1971 Toyota Crown MS50 (third generation) 1971–1974 Toyota Crown MS60/62/70 (fourth generation) 1974–1979 Toyota Crown MS80/82/87/90/100/102/107 (fifth generation) 1979–1983 Toyota Crown MS117V (seventh generation) 1972–1979 Toyota Corona Mark II X10/20/30/40 M-P An LPG version, the M-P and M-PU was produced from 1966 through 1989. The earliest models were simply called the M-LPG, with the emissions scrubbed M-PU replacing it in mid-1976. 1983–1987 Toyota Crown MS120 (seventh generation) 1987–1989 Toyota Crown MS130 (eighth generation) M-E The M-E appeared in the 1972–1976 Toyota Corona Mark II LG sedan and hardtop as sold in Japan. It was not sold outside Japan. The M-E was redesignated as the M-EU for the Japanese market in December 1976 when it