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The most prominent 4-rotor engine from Mazda was used exclusively for various Mazda-built GT cars (including the 767 and 787B) in replacement of the older 13J. In 1991 this engine in a 787B became the first from outside the U.S. or Western Europe and the first (and so far only) car with a rotary engine to win outright the 24 hours of Le Mans race. It displaced 2622 cc and built 700 hp (522 kW) at 9000 rpm. The engine design originates as a single 13B with: an additional rotor and housing added at each end, continually variable geometry intakes, and an additional (third) spark plug. The R26B's rotor housing can be purchased at retail from Mazdaspeed, but no internal parts are available to the general public.