PMO Fuel Pressure Control Unit — Adjustable, Barbed Fittings | Carbureted Porsche 911 / 930 (PM-O403-0)

Carburetors want low, steady fuel pressure — feed them straight off a modern pump and you push fuel past the float valves, flood the bowls, and chase a rich condition that no amount of jetting will cure. The PMO Fuel Pressure Control Unit with barbed fittings (PM-O403-0) sets the pressure where your carburetors actually want it and holds it there.

Features

• Adjustable regulation — dial the pressure to suit your carburetors rather than living with whatever the pump delivers.
• Barbed fittings for standard rubber fuel hose — the straightforward choice on a stock-style fuel line.
• Protects float valves and stops pressure-induced flooding and bowl overflow.
• Made in the USA by PMO.

Fitment

Confirmed: Carbureted air-cooled Porsche 911 and 930 fuel systems running PMO or Weber carburetors.

Choose your fitting style: this is the barbed-hose version. If you are plumbing braided line with AN fittings, order PM-O404-0 instead.

Specifications

• Part number: PM-O403-0
• Fitting type: Barbed (rubber hose)
• UPC: 707924555585
• Country of origin: United States
• Shipping weight: 0.43 lb
• Boxed dimensions: 6 x 6 x 3 in

Questions & Answers

• Why do I need a regulator on a carbureted car? Carburetors need low, stable pressure; too much pressure forces fuel past the float valve and floods the bowls.
• Barbed or AN? This is the barbed version for rubber hose. PM-O404-0 is the AN-6 version for braided line.
• What's the part number? PM-O403-0.
• Are you an authorized dealer? Yes — Washburn's Metal is an authorized PMO dealer.
• How does it ship? Standard ground or air; no hazmat restrictions.

⚠️ WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.