toolscarsrus Categories Other Tractors Electrical Components Vintage Cars Rims Hub Caps Computers Accessories Willys Parts Honda Parts Cadillac Parts Toyota Parts Ford Parts Misc Car Parts Chicago Diecast Pulleys Hydraulic Tools Equipment Briggs Stratton Parts Tecumseh Parts Carbide Cutting Inserts Milling Tools and Cutters Drill Bits Indexable Tool Holders Bars End MIlls Taps Tool Boxes Cabinets Specialty Pumps Motors Electronics GM Parts Brock Equipment Parts 1970-1985 Mazda Rotary Engine 12A and Trans-PARTS ONLY 1970-1985 Mazda Rotary Engine and Trans, No Distributors, No Exhaust System, ONLY Header Pipe. Model "12A", U30735 Made in Hiroshima, Japan. The following specs and general information about this type of engine was taken from Wikipedia: The 12A is an "elongated" version of the 10A: the rotor radius was the same, but the depth was increased by 10 mm (0.39 in) to 70 mm (2.8 in). It continued the two-rotor design; with the depth increase each chamber displaced 573 cc (35.0 cu in) so two chambers (one per rotor) would displace 1,146 cc (69.9 cu in); the series name continues earlier practice and reflects this value ("12" suggesting 1.2 litres). The 12A series was produced for 15 years, from May 1970 through 1985. In 1974, a 12A became the first engine built outside of western Europe or the U.S to finish the 24 hours of Le Mans. In 1974, a new process was used to harden the rotor housing. The Sheet-metal Insert Process (SIP) used a sheet of steel much like a conventional piston engine cylinder liner with a chrome plated surface. The side housing coating was also changed to eliminate the troublesome sprayed metal. The new "REST" process created such a strong housing, the old carbon seals could be abandoned in favour of conventional cast iron. Early 12A engines also feature a thermal reactor, similar to the 0866 10A, and some use an exhaust port insert to reduce exhaust noise. A lean-burn version was introduced in 1979 (in Japan) and 1980 (in America) which substituted a more-conventional catalytic converter for this "afterburner". A major modification of the 12A architecture was the 6PI which featured variable induction ports. Applications: 1970–1972 Mazda R100 1970–1974 Mazda RX-2, 130 hp (97 kW) and 156 N?m (115 lbf?ft) 1972–1974 Mazda RX-3 (Japan), 110 hp (82 kW) and 135 N?m (100 lbf?ft) 1972–1974 Mazda RX-4 1972–1980 Mazda Luce 1978–1985 Mazda RX-7, 100 hp (75 kW) Aero Design DG-1 racing aircraft used two Mazda RX-3 (12A) engines, each driving a propeller—one at the front, the other at the rear of the aircraft. Lean-burn 1979–1985 Mazda RX-7 (Japan) 1980–1985 Mazda RX-7 (United States) 6PI 1981–1985 Mazda Luce 1981–1985 Mazda Cosmo As Is, Where Is, No Returns. Item(s) may be withdrawn if sold locally. Buyer must pay within 48 hours of purchase. Shipping Information: This item requires freight shipping, please request a quote before purchasing. SEE OUR STORE FOR MORE HIGH QUALITY PRODUCTS AT VERY REASONABLE RATES! _gsrx_vers_526 (GS 6.6.6 (526))