Adjustable Fuel Pressure Regulator – Injection to Carburettor Conversion

This bypass/converter regulator for carbureted engines, with or without turbo, allows installation of a low- or high-pressure fuel pump, while ensuring consistent fuel pressure and flow at the outlet. For turbocharged engines, connect the boost to the 5 mm top port to achieve a pressure increase at a 1:1 ratio.

It is a genuine Malpassi regulator, made with a custom aluminum body, hand-assembled, and tested to guarantee maximum performance.

Key Features

• Engine type: Naturally aspirated or turbo carbureted engines

• Fuel compatibility: E85

• Diaphragm: Composite

• Fittings:

  • 1 × Inlet 1/8" NPT

  • 1 × Outlet 1/8" NPT

  • 1 × Return 1/8" NPT

  • 1 × BOOST connection 5 mm (Turbo only)

• Pressure range: 1.5–5 psi (+ boost if turbo)

• Accessories: Includes 3 × 1/8" NPT (8 mm) fittings

• Product: Genuine Malpassi, aluminum body, hand-assembled and tested

Why Choose the Malpassi Regulator?

• High reliability: maintains consistent fuel pressure and flow for stable fuel delivery

• Versatility: compatible with naturally aspirated or turbo engines, E85

• Performance: adjustable boost for turbo with 1:1 ratio

• Malpassi quality: custom aluminum body, hand-assembled and tested

• Easy installation: includes 1/8" NPT fittings

PAFClassic 🇬🇧, official distributor of WEBER and WEBCON brand products.

All the carburetors we offer are genuine WEBERs manufactured in the Magnetti Marelli licensed production plant in Spain.

We have access to over 11,000 references (carburetors and spare parts) as well as the WEBER technical library so that we can provide you with the parts you are looking for for your carburetors.

Make sure you always buy genuine WEBER products like the ones we offer, because copies of these legendary carburetors are now flooding the market.

Often offered at very attractive prices, these copies are often of average manufacturing quality and are not always compatible with genuine WEBER parts (jet sizes for example), therefore not allowing them to be calibrated correctly for your car.