Wankel rotors of 13B The 13B would be the most widely developed rotary engine. It had been The idea for all future Mazda Wankel engines, and was made for more than 30 many years. The 13B has no relation to your 13A. As an alternative, This is a lengthened Model of the 12A, obtaining eighty mm (three.The parents at JJSmotorsport did an awesome care