Fuel Pressure Regulators

Select your vehicle to see Fuel Pressure Regulators that fit

Fuel Pressure Regulators: hold the rail steady so your tune stays honest

A fuel pressure regulator controls the pressure the injectors see, bleeding excess fuel back to the tank or holding a set base pressure at the rail. On a boosted setup a boost-reference regulator raises fuel pressure in step with manifold pressure so the injectors keep their flow rate under load. Fit one when you have upgraded pumps or injectors, when you are running forced induction, or when a worn factory regulator is causing hot-start trouble or an inconsistent idle. It is the part that keeps the numbers your tuner set actually happening at the rail. This is a range of fuel pressure regulators built for exactly that job.

What we stock

There are 98 fuel pressure regulators in this category, spanning 13 brands. The current price range for what is in stock runs from $45 to $515. That is not a promise of any single price, just the spread across the shelf right now. The deepest lines are Aeromotive (31), Fuelab (16), DeatschWerks (15), Radium Engineering (14) and Turbosmart (10), with smaller counts from Bosch, BBK, BLOX Racing, Snow Performance, Nitrous Express, Fleece Performance, AirDog and TwinPower.

Concrete examples: the Aeromotive Pro-Series EFI Boost Reference Regulator 13110 at the top of the range, the Fuelab 565 EFI adjustable FPR with dual -10AN inlets and -10AN return, the Turbosmart FPR10 Pro-Lite, and the combination Turbosmart FPRF8 regulator and filter. For a vehicle-specific route there is the Radium Engineering E46 M3 regulator and fuel filter kit. Belt-drive pump setups have the Aeromotive Belt Drive Pump EFI Regulator 13113.

How to choose

The first decision is universal adjustable versus vehicle-specific. Universal EFI regulators like the Fuelab 565 give you a pressure range and AN-plumbed ports, which suits a custom fuel system but means you supply fittings and set base pressure yourself. A kit like the Radium E46 M3 unit drops into a named platform with less fabrication. Second, match the regulator to your fuel setup: boost-reference units earn their price on forced-induction cars, while a naturally aspirated street car often does not need one. Third, port size and return capability matter - dual -10AN inlets and a max-flow bypass are aimed at high-flow systems, not stock ones. The price walk from $45 to $515 largely tracks flow capacity, adjustability and boost referencing.

What else you need with it

Plan the whole fuel path. Pair a regulator with the right fuel pumps, then handle plumbing with fittings and adapters for your AN ports. Browse the full Engine Components section for supporting parts like oil filters and gasket kits while you are in there.

Fitment and ordering

Fitment data is present on 11 products here and lists makes including Ford, Subaru, Chevrolet, BMW, Harley-Davidson, GM and Mazda across years 1986 to 2021 - vehicles like the Mustang, WRX STi and E46 M3. If you are not sure a regulator suits your build, call 813-535-5801 or reach us through contact us. Every order ships free, and Affirm financing is available.

Fuel Pressure Regulators: hold the rail steady so your tune stays honest

A fuel pressure regulator controls the pressure the injectors see, bleeding excess fuel back to the tank or holding a set base pressure at the rail. On a boosted setup a boost-reference regulator raises fuel pressure in step with manifold pressure so the injectors keep their flow rate under load. Fit one when you have upgraded pumps or injectors, when you are running forced induction, or when a worn factory regulator is causing hot-start trouble or an inconsistent idle. It is the part that keeps the numbers your tuner set actually happening at the rail. This is a range of fuel pressure regulators built for exactly that job.

What we stock

There are 98 fuel pressure regulators in this category, spanning 13 brands. The current price range for what is in stock runs from $45 to $515. That is not a promise of any single price, just the spread across the shelf right now. The deepest lines are Aeromotive (31), Fuelab (16), DeatschWerks (15), Radium Engineering (14) and Turbosmart (10), with smaller counts from Bosch, BBK, BLOX Racing, Snow Performance, Nitrous Express, Fleece Performance, AirDog and TwinPower.

Concrete examples: the Aeromotive Pro-Series EFI Boost Reference Regulator 13110 at the top of the range, the Fuelab 565 EFI adjustable FPR with dual -10AN inlets and -10AN return, the Turbosmart FPR10 Pro-Lite, and the combination Turbosmart FPRF8 regulator and filter. For a vehicle-specific route there is the Radium Engineering E46 M3 regulator and fuel filter kit. Belt-drive pump setups have the Aeromotive Belt Drive Pump EFI Regulator 13113.

How to choose

The first decision is universal adjustable versus vehicle-specific. Universal EFI regulators like the Fuelab 565 give you a pressure range and AN-plumbed ports, which suits a custom fuel system but means you supply fittings and set base pressure yourself. A kit like the Radium E46 M3 unit drops into a named platform with less fabrication. Second, match the regulator to your fuel setup: boost-reference units earn their price on forced-induction cars, while a naturally aspirated street car often does not need one. Third, port size and return capability matter - dual -10AN inlets and a max-flow bypass are aimed at high-flow systems, not stock ones. The price walk from $45 to $515 largely tracks flow capacity, adjustability and boost referencing.

What else you need with it

Plan the whole fuel path. Pair a regulator with the right fuel pumps, then handle plumbing with fittings and adapters for your AN ports. Browse the full Engine Components section for supporting parts like oil filters and gasket kits while you are in there.

Fitment and ordering

Fitment data is present on 11 products here and lists makes including Ford, Subaru, Chevrolet, BMW, Harley-Davidson, GM and Mazda across years 1986 to 2021 - vehicles like the Mustang, WRX STi and E46 M3. If you are not sure a regulator suits your build, call 813-535-5801 or reach us through contact us. Every order ships free, and Affirm financing is available.