Add to Favorite Sellers. Holley 512-502 Stock Replacement Adjustable Fuel Pressure Regulator. Street/Strip EFI Applications Fits 1994-97 LT1/LT4 Camaro/Firebird and 1994-95 LT1 Impala SS Adjustable from 35 to 65 PSI; Holley fuel injection pressure regulators are designed to provide the correct fuel pressure for any high performance fuel injected vehicle. Regulators for dedicated applications are […]