FASCINATION ABOUT MAZDA RX-7 ENGINE

Early 12A engines also characteristic a thermal reactor, comparable to the 0866 10A, and some use an exhaust port insert to cut back exhaust sound. A lean-burn up Variation was launched in 1979 (in Japan) and 1980 (in the usa) which substituted a far more-conventional catalytic converter for this "afterburner". A major modification of the 12A archi