Holley Regulator Rebuild Kit - Fits 12-840 and 12-842 Fuel Pressure Regulators Shields & Blankets Forged 4340 steel crankshaft is

Forged 4340 steel crankshaft is nitrided and micropolished and features a

Kit includes enough fasteners for bumpers and side nerf bars

Angle allows supports or braces to angle upward toward the chassis

Cylinder Heads / Camshaft / Gaskets / Hardware / Intake Manifold / Lifters / Timing Set

Holley Regulator Rebuild Kit - Fits 12-840 and 12-842 Fuel Pressure Regulators Shields & Blankets Forged 4340 steel crankshaft isRegulator 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