In this video I'm showing the assembly of a twin turbocharged 4rotor for my customer. This engine was the first to use our modular tension bolt system. With the modular bolt method, each half of the motor is secured to the center iron. This increased strength for high horsepower applications. It is also how Mazda made the R26b in the legendary 787b race car. Other notable features are full peripheral ports, race exhaust ports, lightened and clearanced rotors, full dynamic balance. Race bearings and complete drysump oil system. Contact [email protected] for any questions regarding your engine build!!