Fuel Pressure Regulator 6-Port Bypass Style

The Fuel Pressure Regulator 6-Port Bypass Style from MAGNAFUEL/MAGNAFLOW FUEL SYSTEMS is a precision fuel management component designed for high-performance and custom engine builds where stable fuel delivery under varying load conditions is critical. Built for serious enthusiasts and professional fabricators, this regulator maintains consistent fuel pressure across engine operating ranges, preventing lean conditions during acceleration and controlling excess pressure during idle. Whether you're running a carbureted engine, EFI conversion, or nitrous oxide system, this bypass-style regulator ensures repeatable combustion and system longevity.

The 6-port bypass design allows excess fuel to return to the tank, maintaining set pressure while protecting injectors and carburetors from overpressurization. This architecture prevents fuel accumulation in return lines and eliminates pressure spikes during hot-soak conditions—a proven topology used in race fuel systems and street performance applications. The regulator's compact form factor (5.3 x 3.2 x 6 inches) and light weight (1 lb) make it ideal for tight engine bay installations where space constraints are common. MAGNAFUEL's engineering ensures repeatable fuel flow rates and stable regulation across PSI ranges, critical for tuning accuracy in forced-induction or naturally aspirated applications.

This fuel pressure regulator serves engine builders, performance shops, and DIY fabricators upgrading fuel delivery on vintage carbureted engines or modern EFI swaps. Installation requires proper line sizing and correct PSI calibration for your specific fuel system; coordination with a carburetist or EFI tuner is recommended to match regulator output to injector or carburetor fuel rail requirements. Compatible with both mechanical and electronic fuel pump setups, the MP-9945 integrates seamlessly into systems using standard -6 AN hose fittings and aluminum fuel rails. Proper plumbing discipline and quality -6 hose clamps ensure leak-free operation and years of reliable pressure management.