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A single polished exhaust valve for Mitsubishi 4G63T engines (Evo I–IX) with a 31.5mm head, listed as +1mm oversize. It’s intended for engine builders and technicians needing a larger exhaust valve for porting or when heads have been machined to accept oversized valves. Sold individually, the valve allows selective upgrades during head work or rebuilds where a +1mm exhaust diameter is required for fitment or powerband tuning.
GSC P-D Mitsubishi 4G63T Evo 1-9 Chrome Polished Exhaust Valve - 31.5mm Head (+1mm) - Single
