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The Precision Raceworks G8x/G2x Stand Alone Auxiliary Fuel System is the highest-performing and most stable low-pressure fuel system on the market! Forget about how things have been done and embrace the benefits of dedicated fueling for your port injection!
Since direct injection came out for BMW, enthusiasts have been adding port injection. With this came the need to upgrade the low-pressure fuel system to keep up. Historically this was done by increasing the output of the main fuel system. Unfortunately, the main fuel pump is controlled using PWM by a factory programmed controller designed to reduce output when target fuel pressure (typically 5 bar) is exceeded, creating a constant battle when pumps are added or upgraded. This limits upgraded fuel pumps from performing to their full potential.
Additionally, the high-pressure pump control system dumps fuel back into the low-pressure system at high pressure low volume resulting in oscillations of the low-pressure fuel system. Because of this, the DI system in the car is required to constantly make corrections to keep target AFR in check.
With this stand-alone low-pressure fuel system dedicated to your port fueling that is a thing of the past! Get rock-solid fuel pressures at any pressure, run fuel pressures that are 1:1 scalable to boost pressure, flow more fuel with dedicated lines, run smaller injectors and still get more fuel than you did with large injectors (allowing for higher resolution), put less demand on the car’s DI system to correct for fluctuations in pressure, even your tuner will be grateful as the system makes tuning of port fueling even easier and more accurate, the list of benefits goes on and on!
Features & Benefits
Billet Aluminum top hat with 3 high-flow fuel ports
Dedicated fuel pump(s) for port injection system
Optimal pump location resistant to fuel slosh under acceleration
Fully adjustable 1:1 scaling billet fuel pressure regulator
10-micron USA made Microglass fuel filter (Ideal for E85)
Smooth bore high flow PTFE fuel feed & return lines (AN6)
All billet connections for both fuel line fittings and top-hat
Plug and play connectors inside and outside* the top hat
Configurable pump activation harness (see instructions for more details)
Increased injector flow (when using 1:1 regulator feature vs static)
Compatible with all stock or upgraded primary fuel pumps
Easily expandable and upgrade-able for more fuel
All components and parts feature 100% Ethanol Compatibility
The AFS.800 dedicated auxiliary fuel system comes with all** necessary components to provide dedicated fuel system for port injection. Featuring Two Walbro 535’s (F9000295) fuel pumps with a combined flow of 800LPH at 3 bar.
Pump flow 43.5 psi-a : 800 lph
Recommended base pressure: 43.5 psi-g
Maximum Fuel Pressure: 110 psi-g
Number of Fuel Output Ports: 2
Number of Fuel Return Ports: 1
Pump 1: Walbro 535 (F90000295)
Pump 2: Walbro 535 (F90000295)
Available (unused) Electrical Connections: 2*
Total System Weight:14 lbs (including fuel lines and wiring harness)
*At time of install some wiring in the car may need to be cut and spliced to connectors included in this kit
**Male AN8-ORB to Female AN6-ORB adapter may be required for compatibility with some fuel rails (not included in kit)
BMW Washer Fluid Tank Cap - G2X G8X is a premium upgrade that enhances both the appearance and durability of your BMW’s engine bay. Designed as a direct replacement for the factory cap, this precision-engineered component eliminates the flimsy plastic construction and dull blue color, replacing it with a sleek, high-quality billet aluminum design.
Crafted for both style and functionality, this washer fluid cap ensures a secure fit while adding a refined, motorsport-inspired touch to your engine bay. Built to withstand extreme temperatures and chemical exposure, it provides long-lasting performance and a premium aesthetic upgrade.
Upgrade your BMW with a BMW Washer Fluid Tank Cap - G2X G8X, providing both superior durability and a refined appearance.
Inline Fuel Filter AN8 Single In/Out - Universal Fitment | Precision Raceworks is a high-performance fuel filtration solution designed for BMW and other high-performance applications. This inline fuel filter ensures superior filtration, protecting your engine from contaminants that can compromise fuel system performance.
Crafted from high-quality billet aluminum, the filter body is precision-machined for durability and reliability. Featuring AN8 female ORB fittings on each end, this universal-fitment filter integrates seamlessly into custom fuel setups, making it ideal for both street and track applications.
Note: Mounting hardware is not included.
Ensure clean and efficient fuel delivery with the Inline Fuel Filter AN8 Single In/Out - Universal Fitment | Precision Raceworks, engineered for high-performance reliability.
This product was last offered at the strikethrough price on
05-13-2026
The Precision Raceworks Stand-Alone Auxiliary Fuel System is the highest performing and most stable low-pressure fuel system on the market! Forget about how things have been done and embrace the benefits of dedicated fueling for your port injection!
Since direct injection came out, enthusiasts have been adding port injection. With this came the need to upgrade the low-pressure fuel system to keep up. Historically, this was done by increasing the output of the main fuel system. Unfortunately, the main fuel pump is controlled using PWM by a factory-programmed controller designed to reduce output when target fuel pressure (typically 5 bar) is exceeded, creating a constant battle when pumps are added or upgraded. This limits upgraded fuel pumps from performing to their full potential.
Additionally, the high-pressure pump control system dumps fuel back into the low-pressure system at high pressure, low volume, resulting in oscillations of the low-pressure fuel system. Because of this, the DI system in the car is required to constantly make corrections to keep the target AFR in check.
With this stand-alone low-pressure fuel system dedicated to your port fueling, that is a thing of the past! Get rock-solid fuel pressures at any pressure, run fuel pressures which are 1:1 scalable to boost pressure, flow more fuel with dedicated lines, run smaller injectors and still get more fuel than you did with large injectors (allowing for higher resolution), and put less demand on the car’s DI system to correct for fluctuations in pressure. Even your tuner will be grateful as the system makes tuning of port fueling even easier and more accurate. The list of benefits goes on and on!
The Precision Raceworks G8x/G2x Stand Alone Auxiliary Fuel System is the highest-performing and most stable low-pressure fuel system on the market! Forget about how things have been done and embrace the benefits of dedicated fueling for your port injection!
Since direct injection came out for BMW, enthusiasts have been adding port injection. With this came the need to upgrade the low-pressure fuel system to keep up. Historically this was done by increasing the output of the main fuel system. Unfortunately, the main fuel pump is controlled using PWM by a factory programmed controller designed to reduce output when target fuel pressure (typically 5 bar) is exceeded, creating a constant battle when pumps are added or upgraded. This limits upgraded fuel pumps from performing to their full potential.
Additionally, the high-pressure pump control system dumps fuel back into the low-pressure system at high pressure low volume resulting in oscillations of the low-pressure fuel system. Because of this, the DI system in the car is required to constantly make corrections to keep target AFR in check.
With this stand-alone low-pressure fuel system dedicated to your port fueling that is a thing of the past! Get rock-solid fuel pressures at any pressure, run fuel pressures that are 1:1 scalable to boost pressure, flow more fuel with dedicated lines, run smaller injectors and still get more fuel than you did with large injectors (allowing for higher resolution), put less demand on the car’s DI system to correct for fluctuations in pressure, even your tuner will be grateful as the system makes tuning of port fueling even easier and more accurate, the list of benefits goes on and on!
Features & Benefits
Billet Aluminum top hat with 3 high-flow fuel ports
Dedicated fuel pump(s) for port injection system
Optimal pump location resistant to fuel slosh under acceleration
Fully adjustable 1:1 scaling billet fuel pressure regulator
10-micron USA made Microglass fuel filter (Ideal for E85)
Smooth bore high flow PTFE fuel feed & return lines (AN6)
All billet connections for both fuel line fittings and top-hat
Plug and play connectors inside and outside* the top hat
Configurable pump activation harness (see instructions for more details)
Increased injector flow (when using 1:1 regulator feature vs static)
Compatible with all stock or upgraded primary fuel pumps
Easily expandable and upgrade-able for more fuel
All components and parts feature 100% Ethanol Compatibility
The AFS.425 dedicated auxiliary fuel system comes with all** necessary components to provide a dedicated fuel system for port injection. Featuring a single Walbro 450 (F9000274) fuel pump which flows 425LPH at 3 bar.
Pump flow 43.5 psi-a : 425lph
Recommended base pressure: 43.5 psi-g
Maximum Fuel Pressure: 110 psi-g
Number of Fuel Output Ports: 2
Number of Fuel Return Ports: 1
Pump 1: Walbro 450 (F90000274)
Pump 2: N/A
Available (unused) Electrical Connections: 4*
Total System Weight: 11 lbs (including fuel lines and wiring harness)
*At time of install some wiring in the car may need to be cut and spliced to connectors included in this kit
**Male AN8-ORB to Female AN6-ORB adapter may be required for compatibility with some fuel rails (not included in kit)
The Precision Raceworks G8x/G2x Stand Alone Auxiliary Fuel System is the highest-performing and most stable low-pressure fuel system on the market! Forget about how things have been done and embrace the benefits of dedicated fueling for your port injection!
Since direct injection came out for BMW, enthusiasts have been adding port injection. With this came the need to upgrade the low-pressure fuel system to keep up. Historically this was done by increasing the output of the main fuel system. Unfortunately, the main fuel pump is controlled using PWM by a factory programmed controller designed to reduce output when target fuel pressure (typically 5 bar) is exceeded, creating a constant battle when pumps are added or upgraded. This limits upgraded fuel pumps from performing to their full potential.
Additionally, the high-pressure pump control system dumps fuel back into the low-pressure system at high pressure low volume resulting in oscillations of the low-pressure fuel system. Because of this, the DI system in the car is required to constantly make corrections to keep target AFR in check.
With this stand-alone low-pressure fuel system dedicated to your port fueling that is a thing of the past! Get rock-solid fuel pressures at any pressure, run fuel pressures that are 1:1 scalable to boost pressure, flow more fuel with dedicated lines, run smaller injectors and still get more fuel than you did with large injectors (allowing for higher resolution), put less demand on the car’s DI system to correct for fluctuations in pressure, even your tuner will be grateful as the system makes tuning of port fueling even easier and more accurate, the list of benefits goes on and on!
Features & Benefits
Billet Aluminum top hat with 3 high-flow fuel ports
Dedicated fuel pump(s) for port injection system
Optimal pump location resistant to fuel slosh under acceleration
Fully adjustable 1:1 scaling billet fuel pressure regulator
10-micron USA made Microglass fuel filter (Ideal for E85)
Smooth bore high flow PTFE fuel feed & return lines (AN6)
All billet connections for both fuel line fittings and top-hat
Plug and play connectors inside and outside* the top hat
Configurable pump activation harness (see instructions for more details)
Increased injector flow (when using 1:1 regulator feature vs static)
Compatible with all stock or upgraded primary fuel pumps
Easily expandable and upgrade-able for more fuel
All components and parts feature 100% Ethanol Compatibility
The AFS.640 dedicated auxiliary fuel system comes with all** necessary components to provide dedicated fuel system for port injection. Featuring Two Walbro 450’s (F9000274) fuel pumps with a combined flow of 640LPH at 3 bar.
Pump flow 43.5 psi-a : 640 lph
Recommended base pressure: 43.5 psi-g
Maximum Fuel Pressure: 110 psi-g
Number of Fuel Output Ports: 2
Number of Fuel Return Ports: 1
Pump 1: Walbro 450 (F90000274)
Pump 2: Walbro 450 (F90000274)
Available (unused) Electrical Connections: 2*
Total System Weight: 14 lbs (including fuel lines and wiring harness)
*At time of install some wiring in the car may need to be cut and spliced to connectors included in this kit
**Male AN8-ORB to Female AN6-ORB adapter may be required for compatibility with some fuel rails (not included in kit)
BMW B58 S58 Billet Engine Oil Cap is a premium upgrade designed to enhance both the functionality and aesthetics of your BMW’s engine bay. Unlike generic aftermarket options, this billet oil cap incorporates OEM internals, ensuring proper pressure relief and maintaining factory reliability.
Precision-machined from high-quality billet aluminum, this oil cap provides exceptional durability while offering a sleek, performance-inspired look. Its anodized finish resists corrosion, heat, and wear, making it a long-lasting solution for enthusiasts who demand both style and reliability.
Upgrade your BMW’s engine bay with a BMW B58 S58 Billet Engine Oil Cap, a perfect combination of OEM functionality and high-performance styling.
The Precision Raceworks G8x/G2x Stand Alone Auxiliary Fuel System is the highest-performing and most stable low-pressure fuel system on the market! Forget about how things have been done and embrace the benefits of dedicated fueling for your port injection!
Since direct injection came out for BMW, enthusiasts have been adding port injection. With this came the need to upgrade the low-pressure fuel system to keep up. Historically this was done by increasing the output of the main fuel system. Unfortunately, the main fuel pump is controlled using PWM by a factory programmed controller designed to reduce output when target fuel pressure (typically 5 bar) is exceeded, creating a constant battle when pumps are added or upgraded. This limits upgraded fuel pumps from performing to their full potential.
Additionally, the high-pressure pump control system dumps fuel back into the low-pressure system at high pressure low volume resulting in oscillations of the low-pressure fuel system. Because of this, the DI system in the car is required to constantly make corrections to keep target AFR in check.
With this stand-alone low-pressure fuel system dedicated to your port fueling that is a thing of the past! Get rock-solid fuel pressures at any pressure, run fuel pressures that are 1:1 scalable to boost pressure, flow more fuel with dedicated lines, run smaller injectors and still get more fuel than you did with large injectors (allowing for higher resolution), put less demand on the car’s DI system to correct for fluctuations in pressure, even your tuner will be grateful as the system makes tuning of port fueling even easier and more accurate, the list of benefits goes on and on!
Features & Benefits
Billet Aluminum top hat with 3 high-flow fuel ports
Dedicated fuel pump(s) for port injection system
Optimal pump location resistant to fuel slosh under acceleration
Fully adjustable 1:1 scaling billet fuel pressure regulator
10-micron USA made Microglass fuel filter (Ideal for E85)
Smooth bore high flow PTFE fuel feed & return lines (AN6)
All billet connections for both fuel line fittings and top-hat
Plug and play connectors inside and outside* the top hat
Configurable pump activation harness (see instructions for more details)
Increased injector flow (when using 1:1 regulator feature vs static)
Compatible with all stock or upgraded primary fuel pumps
Easily expandable and upgrade-able for more fuel
All components and parts feature 100% Ethanol Compatibility
The AFS.745 dedicated auxiliary fuel system comes with all** necessary components to provide dedicated fuel system for port injection. Featuring One Walbro 450 (F900074) & One Walbro 535 (F9000295) fuel pumps with a combined flow of 745LPH @ 3bar.
Pump flow 43.5 psi-a : 745 lph
Recommended base pressure: 43.5 psi-g
Maximum Fuel Pressure: 110 psi-g
Number of Fuel Output Ports: 2
Number of Fuel Return Ports: 1
Pump 1: Walbro 535 (F90000295)
Pump 2: Walbro 450 (F90000274)
Available (unused) Electrical Connections: 2*
Total System Weight:14 lbs (including fuel lines and wiring harness)
*At time of install some wiring in the car may need to be cut and spliced to connectors included in this kit
**Male AN8-ORB to Female AN6-ORB adapter may be required for compatibility with some fuel rails (not included in kit)