GSC Power Division Exhaust Valve for Mitsubishi 4G63T Evo 1-9 31.5mm +1mm

GSC Power Division Exhaust Valve — Mitsubishi 4G63T Evo 1-9 (31.5mm +1mm) Upgrade your 4G63T with the GSC Power Division polished super alloy exhaust valve. Built for Evo 1–9 engines, this high-performance valve features a 31.5mm head with +1mm overstock for improved flow and durability under boost, heat, and higher RPMs. Fitment: Mitsubishi 4G63T Evo I–IX Head Diameter: 31.5mm (+1mm) Material: Polished super alloy for superior heat resistance and wear life Finish: Precision polished for reduced carbon buildup and smoother airflow Application: Street performance, track, and high-boost builds Designed and manufactured by GSC Power Division, this exhaust valve delivers reliable valve-seat sealing, consistent lift characteristics, and long-term strength for modified 4G63T engines. Ideal for porting, head builds, and upgraded valvetrain setups. Why choose this valve? Enhanced flow, high-temperature durability, and factory-compatible dimensions make it a straightforward upgrade for tuners seeking improved exhaust scavenging and longevity.