Holley Fuel Pressure Regulator 12-704

Precise fuel pressure control is fundamental to carburetor and fuel system tuning—and the Holley 12-704 delivers adjustable regulation across the 4.5–9 psi range that most naturally aspirated and moderately boosted engines demand. Whether you're running gasoline, E85, or methanol, this in-line regulator maintains consistent fuel delivery under varying load conditions, eliminating lean-out hesitation and improving throttle response. The polished aluminum construction and included fittings make this a straightforward bolt-on solution for street, strip, and shop applications.

• Pressure range: 4.5–9 psi
• In-line configuration
• 1/2" NPT inlet
• 1/2" NPT outlet
• Billet aluminum body
• Polished finish
• Fittings included
• E85/gasoline/methanol compatible
• Sold individually