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The GSC Power Division super-alloy exhaust valve set for 4B11T engines includes eight chrome-polished exhaust valves with 30mm heads (+1mm). Supplied as a complete set of eight, these +1mm super-alloy valves are specified for applications needing a modest increase in exhaust head diameter while maintaining the polished finish and matched sizing for proper installation.
GSC P-D 4B11T Chrome Polished Super Alloy Exhaust Valve - 30mm Head (+1mm) - SET 8
