An adjustable fuel pressure regulator is an easy way to adjust your air/fuel mixture at wide open throttle and help fine tune your fuel trim levels. This 92-96 Corvette regulator is a factory replacement that bolts directly to your fuel rail with one bolt and one fuel line attachment. This product is for fine tuning only. Not intended to make major changes to your mixture due to large injectors, rich idle conditions, etc...where programming may be needed.