Wankel rotors of 13B The 13B will be the most generally made rotary engine. It absolutely was The premise for all long term Mazda Wankel engines, and was developed for over thirty yrs. The 13B has no relation into the 13A. As a substitute, This is a lengthened version with the 12A, owning eighty mm (three.JDM Engine Depot is a proud supplier of ge