FASCINATION ABOUT MAZDA RX-7 ENGINE

Early 12A engines also function a thermal reactor, much like the 0866 10A, plus some use an exhaust port insert to scale back exhaust noise. A lean-burn version was introduced in 1979 (in Japan) and 1980 (in the usa) which substituted a more-conventional catalytic converter for this "afterburner". A major modification with the 12A architecture was