Wankel rotors of 13B The 13B will be the most generally produced rotary engine. It had been The premise for all potential Mazda Wankel engines, and was manufactured for more than 30 yrs. The 13B has no relation to the 13A. Alternatively, It is just a lengthened Model of your 12A, getting 80 mm (three.The engines became well-known with kit automobi