GSC Power Division Exhaust Valve Guide for 4G63T Evo 4-9 OD .4750in ID .2598i...

GSC Power Division Exhaust Valve Guide for 4G63T (Evo 4–9) GSC Power Division exhaust valve guide engineered for Mitsubishi 4G63T Evo 4–9 applications. Precision-machined for reliable valve seating, heat management, and consistent oil control in high-performance engines. Fitment: Mitsubishi 4G63T Evolution 4–9 Outer Diameter (OD): 0.4750 in Inner Diameter (ID): 0.2598 in Overall Length (OL): 1.950 in Configuration: Exhaust valve guide — single unit Constructed to tight tolerances, this valve guide improves valve stability at elevated RPM and under increased thermal load. Ideal for street, track, and competition engines where durability and consistent valve train geometry are critical. Benefits: enhanced valve-to-guide control, improved heat dissipation, reduced oil consumption at the valve stem, and straightforward installation with proper machining. Upgrade your 4G63T cylinder head with a component trusted by tuners and engine builders for repeatable performance and longevity.