Pro-Stock 4-Port Fuel Regulator

The Pro-Stock 4-Port Fuel Regulator by Aeromotive is engineered for serious performance builders and professional tuners who demand precise fuel delivery control in high-output naturally aspirated and forced-induction applications. This regulator addresses a critical pain point in fuel system design: maintaining stable fuel pressure across varying engine loads, RPM ranges, and boost conditions. Whether you're building a carbureted hot rod, tuning a fuel-injected street machine, or developing a competition engine, fuel pressure stability directly impacts jetting accuracy, boost response, and overall drivability—making the right regulator selection essential to your build's success.

The 4-port design allows independent regulation of fuel pressure and return flow, offering unmatched flexibility in complex fuel system architectures. This configuration supports both single and dual-carb setups, turbocharged applications, and modern returnless fuel injection systems by decoupling fuel supply pressure from return circuit back-pressure. The regulator's internal poppet valve maintains consistent outlet pressure regardless of inlet flow variations or boost fluctuations, preventing lean-out conditions that degrade performance and damage engines. Compact dimensions (4.8 x 4.1 x 8.7 inches) and lightweight construction (1.11 lbs) facilitate clean engine bay layouts without sacrificing robustness or flow capacity—critical for space-constrained builds like mid-engine race cars or tightly packaged LS swaps.

Professional engine builders, fuel system integrators, and high-performance tuning shops rely on this regulator for carburetor rebuilds, EFI conversions, turbo and supercharger installations, and competition fuel system validation. Installation pairs seamlessly with Aeromotive pumps and fuel rails, though compatibility extends to any system using standard -6 and -8 AN fittings. The 4-port architecture proves invaluable when transitioning from carburetors to EFI or when retrofitting return-style fuel systems into vehicles originally equipped with returnless designs—scenarios where traditional single-port regulators introduce tuning compromises or system conflicts.