Upgrade your Eaton M90 with the Magnum Powers MP Extreme (MPx) 90 cu. in. Supercharger Case. Cast from stronger 356-T6 aluminum and engineered with larger intake and outlet ports, thicker walls, and a full-length stiffening boss, the MPx case delivers significantly improved airflow and durability. Designed to support higher rotor speeds without sacrificing volumetric efficiency, this upgrade allows you to reuse your existing rotors for a straightforward, high-performance installation.