Holley Regulator Rebuild Kit - Fits 12-840 and 12-842 Fuel Pressure Regulators 20194YW The rear body harness plugs

The rear body harness plugs into the dash harness at the left kick panel

Fits trucks with factory truck arms and coil spring rear suspension (unique frame for rear coil springs)

alignment tools

REQUIRES THE USE OF A REMOTE FUEL PUMP and some space below the front of the engine

Clear to Dark Smoke

Holley Regulator Rebuild Kit - Fits 12-840 and 12-842 Fuel Pressure Regulators 20194YW The rear body harness plugsRegulator Rebuild Kit Fits 12 840 and 12 842 Fuel Pressure Regulators Regulator Rebuild Kit for 12 841 and 12 842 Billet By Pass Regulators. Includes complete diaphragm, spring and rebuild instructions. Features: Fuel Pressure regulator rebuild kit for Holley HLY12 841 and HLY12 842 fuel pressure regulatorsHolley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every NASCAR Cup team and nearly every NHRA