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The GSC exhaust valve guide offered here is a single +.003in oversize OD unit with stopper for Nissan SR20DET and RB26 exhaust applications. This larger oversize option helps correct more pronounced guide bore wear during head refurbishment. It supplies a precise, serviceable replacement to re-establish correct valve stem alignment and clearance on affected exhaust ports.
GSC P-D Nissan SR20DET/RB26 Exhaust Valve Guide w/Stopper +.003in Oversize OD - Single
