RUMORED BUZZ ON ROTARY 13B

Early 12A engines also attribute a thermal reactor, just like the 0866 10A, and some use an exhaust port insert to lower exhaust noise. A lean-burn off Model was released in 1979 (in Japan) and 1980 (in the usa) which substituted a more-common catalytic converter for this "afterburner". An important modification with the 12A architecture was the 6P