Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
The Supertech dual valve spring kit for Mitsubishi EVO X 4B11 engines offers paired springs to enhance valve control and minimize float as engine speeds increase. The description explicitly advises using the OEM seal-seat when installing this kit. It is presented as a valvetrain retention solution for EVO X 4B11 engines needing additional spring capacity.
Supertech Mitsubishi EVO X 4B11 Dual Valve Spring Kit (Use OEM Seal-Seat)
