The GSC Power Division manganese bronze intake/exhaust valve guide for Mazda Miata 1.6L/1.8L is a single oversize replacement supplied +.001in. Sized to match Miata heads, this guide lets you correct worn bores or fit slightly larger stems while keeping valve alignment and sealing behavior consistent with factory geometry during routine rebuilds or selective repairs.
GSC P-D Mazda Miata 1.6L/1.8L Manganese Bronze Intake/Exhaust Valve Guide +.001in Oversize - Single