Billet Bypass Fuel Pressure Regulator4.5-9psi Adjustable Polished 3/8" NPT Ports

Billet Bypass Fuel Pressure Regulator — 4.5–9 PSI Adjustable, Polished

Take control of fuel delivery in carburettor systems with Aeroflow's Billet Bypass Fuel Pressure Regulator. This precision regulator maintains consistent pressure from the pump to the carburettor, preventing overpressure that can overwhelm needles and seats, cause flooding, or impact drivability. Built from billet aluminium with a polished finish, it blends durability with a clean, professional install.

Key advantages

• Billet aluminium body with a polished finish for strength and a refined appearance
• Adjustable fuel pressure from 4.5 to 9 PSI to suit your carburettor setup
• 3/8" NPT ports with a bottom return, enabling an efficient return path to the tank
• Designed for return-line systems to the fuel tank, reducing pump load for quieter operation and extended pump life
• Available finishes include blue, black, red anodised or polished
• Suitable for pump fuel, E85 alcohol and diesel fuels

The regulator precisely controls the fuel pressure traveling from the pump to the carburettor, ensuring the needle and seat receive the correct pressure for stable idling, throttle response, and predictable performance. By maintaining the correct pressure, it helps prevent flooding and improves overall engine drivability.

Setup and compatibility

• Ideal for carburettor fuel pump installations that include a return line to the tank
• Recommended for use with carburettor fuel pumps only and not intended for EFI systems

Specifications at a glance

• Fittings: 3/8" NPT
• Adjustment range: 4.5–9 PSI
• Port size: 3/8" NPT
• Bottom return port
• Overall Length: 70 mm
• Body Height: 59 mm
• Bracket Height: 42 mm
• Overall Width: 38 mm
• Bracket Centre to Centre: 43 mm