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GSC Power Division 31.5mm chrome-polished super-alloy exhaust valves (+1mm) for the 4G63T family (Evo1–9 / DSM 1990–1998), set of eight. The +1mm sizing increases valve head diameter compared to standard while preserving fitment for compatible heads. Offered as a direct-fit performance-oriented replacement for exhaust-side valve service during head rebuilding or performance porting.
GSC P-D 4G63T Evo1-9/DSM 90-98 Chrome Polished Super Alloy Exhaust Valve - 31.5mm Head(+1mm) -SET 8
