RX7 MOTOR OPTIONS

Early 12A engines also aspect a thermal reactor, much like the 0866 10A, and some use an exhaust port insert to lessen exhaust noise. A lean-burn off version was launched in 1979 (in Japan) and 1980 (in America) which substituted a more-common catalytic converter for this "afterburner". An important modification on the 12A architecture was the 6PI