1986-95 GM TBI OEM 11-12 PSI fuel pressure regulator spring - stock fuel pressure for most GM TBI motors.  1994-95 BBC TBI motors are usually 28psi 

These springs have been cleaned, spring rate checked and are coated in a BLACK protective coating to prevent rusting which kills most stock springs

Fits: 1986-95 2.8L 4.3L 5.0L 5.7L 7.4L TBI motors Silverado Sierra Suburban Yukon Blazer Camaro Firebird Caprice S10 Jimmy

2nd photo shows what these injector assemblies look like

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