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Product Details
The Turbosmart FPRF6 Black Fuel Pressure Regulator with Integrated Fuel Filter (TS-0404-1522) is a premium fuel management solution designed to provide precise fuel pressure regulation and high-performance filtration in a single compact assembly. Combining an adjustable fuel pressure regulator with an integrated washable stainless steel fuel filter, the FPRF6 offers a convenient solution for performance enthusiasts building or upgrading a return-style fuel system.
Featuring -6AN fuel inlet, outlet, and return connections, an adjustable 35–80 PSI base fuel pressure range, true 1:1 manifold-referenced regulation, and a 10-micron stainless steel filter element, the FPRF6 is engineered for demanding street performance and motorsport applications.
Unlike conventional aftermarket fuel systems that require a separate fuel pressure regulator and fuel filter, the Turbosmart FPRF6 integrates both components into one housing. This design simplifies fuel system plumbing, reduces the number of separate fittings and connections required, and provides a cleaner installation.
The FPRF6 incorporates Turbosmart's proven pressure regulation technology, including a stainless steel valve seat and motorsport-grade diaphragm. These components are designed to provide consistent fuel pressure control across changing engine loads and manifold pressure conditions.
For turbocharged and supercharged engines, the regulator's true 1:1 pressure reference ratio is particularly important. As intake manifold boost pressure increases, the regulator increases fuel rail pressure proportionally, helping maintain the intended pressure differential across the fuel injectors.
For example, with a base fuel pressure of 43.5 PSI, the regulator should target approximately 53.5 PSI at 10 PSI of boost, assuming the fuel pumps and supporting components can maintain the required pressure and flow.
The integrated 10-micron stainless steel mesh filter helps capture fine fuel contaminants before they reach sensitive downstream components. Its high-flow construction is designed to provide effective filtration while minimizing unnecessary restriction.
Unlike conventional disposable fuel filters, the stainless steel filter cartridge is washable and reusable, allowing periodic maintenance without requiring replacement of the entire filter assembly.
The FPRF6 is designed for performance fuel systems utilizing -6AN plumbing, making it an excellent option for street-driven turbocharged vehicles, supercharged applications, naturally aspirated performance engines, and custom fuel system conversions.
Its compact combined design is especially useful in engine bays where space is limited or where a streamlined fuel system installation is preferred.
A dedicated 1/8-inch NPT gauge or pressure sensor port provides a convenient location for installing a compatible mechanical fuel pressure gauge or electronic fuel pressure transducer.
This allows fuel pressure to be monitored during installation, tuning, and normal operation.
The regulator also features Turbosmart's unique locking collar design, which helps maintain the integrity of the assembly.
Finished in black, the FPRF6 complements aftermarket fuel rails, braided fuel lines, billet engine components, and custom performance engine bays.
For Honda and Acura enthusiasts, the FPRF6 provides a premium solution for custom K20, K24, B16, B18, and B20 fuel systems requiring adjustable fuel pressure regulation and integrated filtration.
Whether upgrading a turbocharged K-Series engine, converting to a return-style fuel system, or replacing separate fuel pressure regulator and filter components, the Turbosmart FPRF6 TS-0404-1522 delivers reliable fuel pressure control, serviceable filtration, and durable construction in one integrated package.
Features
Turbosmart FPRF6 Series: Premium fuel pressure regulator with integrated fuel filtration.
Combined Regulator and Filter Assembly: Incorporates two essential fuel system components into one compact unit.
-6AN Fuel Inlet: Designed for compatible performance fuel supply systems.
-6AN Fuel Outlet: Provides a regulated fuel connection for suitable fuel system configurations.
-6AN Fuel Return Connection: Supports return-style fuel pressure regulation.
35–80 PSI Adjustable Base Pressure: Allows precise adjustment for compatible fuel injection systems.
True 1:1 Pressure Reference Ratio: Maintains the intended fuel pressure differential under changing manifold pressure.
Integrated 10-Micron Fuel Filter: Helps capture contaminants before they reach downstream fuel system components.
Washable Stainless Steel Filter Element: Provides a serviceable alternative to disposable fuel filters.
High-Flow Filter Design: Designed to minimize restriction while maintaining effective filtration.
Stainless Steel Valve Seat: Provides durability and consistent pressure regulation.
Motorsport-Grade Diaphragm: Designed for responsive operation and compatibility with demanding fuels.
1/8-Inch NPT Gauge Port: Accommodates a compatible fuel pressure gauge or electronic pressure sensor.
Unique Locking Collar Design: Helps maintain secure regulator assembly construction.
Broad Fuel Compatibility: Suitable for gasoline, ethanol blends, methanol, racing fuels, and aggressive leaded fuels.
Black Exterior Finish: Provides a clean appearance for custom engine compartments.
Reduced Plumbing Complexity: Eliminates the need for a separate fuel filter housing in compatible installations.
Fewer External Connections: Can reduce potential leak points compared with separate components.
Return-Style Fuel System Compatibility: Designed for fuel systems utilizing a dedicated return line.
Turbocharged Engine Compatibility: Supports boost-referenced fuel pressure regulation.
Supercharged Engine Compatibility: Suitable for properly configured forced-induction fuel systems.
Naturally Aspirated Performance Applications: Can be used in compatible return-style fuel systems.
Compact Integrated Design: Helps simplify component placement in crowded engine bays.
Serviceable Filtration System: Allows periodic filter inspection and cleaning.
Universal Custom Fitment: Suitable for appropriately configured aftermarket fuel systems.
Additional Information
- Manufacturer: Turbosmart
- Part Number: TS-0404-1522
- Product Series: FPRF6
- Product Type: Fuel Pressure Regulator with Integrated Fuel Filter
- Configuration: Adjustable Bypass / Return-Style Regulator
- Finish: Black
- Fuel Inlet: -6AN
- Fuel Outlet: -6AN
- Fuel Return: -6AN
- Adjustable Base Fuel Pressure: 35–80 PSI
- Pressure Reference Ratio: True 1:1
- Integrated Filter: Yes
- Filter Rating: 10 Microns
- Filter Element: Washable Stainless Steel Mesh Cartridge
- Valve Seat: Stainless Steel
- Diaphragm: Motorsport-Grade
- Gauge / Sensor Port: 1/8-Inch NPT
- Compatible Fuels: Gasoline, Ethanol-Based Fuels, Methanol, Racing Fuels, and Leaded Fuels
- Fuel System Type: Return-Style
- Application: Universal / Custom Performance Fuel Systems
Integrated Fuel Pressure Regulation and Filtration
The Turbosmart FPRF6 combines an adjustable fuel pressure regulator and a high-flow fuel filter into one compact assembly.
Traditional aftermarket fuel systems commonly use separate regulator and filter housings connected through additional fuel lines and fittings.
The FPRF6 integrates these components to simplify plumbing and provide a cleaner installation.
Potential advantages include reduced component count, fewer external connections, easier packaging, and improved service accessibility.
The complete fuel system must still be designed to provide adequate flow and pressure for the intended engine.
True 1:1 Fuel Pressure Regulation
The FPRF6 uses a true 1:1 manifold pressure reference ratio.
This means fuel rail pressure is designed to increase by approximately 1 PSI for every 1 PSI increase in manifold boost pressure.
For example, with a base fuel pressure of 43.5 PSI:
0 PSI Boost: Approximately 43.5 PSI fuel pressure.
10 PSI Boost: Approximately 53.5 PSI fuel pressure.
20 PSI Boost: Approximately 63.5 PSI fuel pressure.
30 PSI Boost: Approximately 73.5 PSI fuel pressure.
These examples assume adequate fuel pump capacity, correct regulator adjustment, and properly configured pressure reference plumbing.
Maintaining the correct pressure differential across the injectors helps ensure consistent fuel delivery.
Adjustable 35–80 PSI Base Pressure
The TS-0404-1522 features an adjustable base fuel pressure range of 35–80 PSI.
This allows the regulator to be configured for a variety of performance fuel injection systems.
Base pressure should be selected according to the fuel injector specifications, engine management calibration, and intended operating conditions.
The regulator's base adjustment range should not be confused with its maximum operating fuel pressure.
Fuel rail pressure may increase above the base setting during boosted operation.
Integrated 10-Micron Stainless Steel Fuel Filter
The FPRF6 incorporates a 10-micron stainless steel mesh fuel filter.
This filter is designed to capture fine contaminants that could otherwise reach fuel injectors and other downstream components.
Fuel injectors contain precision internal components that can be affected by contamination.
Proper filtration helps maintain reliable fuel delivery and reduces the risk of injector problems caused by debris.
Washable and Reusable Filter Cartridge
Unlike conventional disposable fuel filters, the FPRF6 uses a washable stainless steel filter element.
The filter can be serviced according to Turbosmart's maintenance recommendations.
Periodic inspection and cleaning help maintain fuel flow and prevent restriction caused by accumulated contaminants.
The filter element should be cleaned or replaced as necessary based on fuel system conditions and manufacturer guidance.
-6AN Fuel Connections
The FPRF6 is designed for performance fuel systems utilizing -6AN connections.
This size is commonly used in upgraded street performance and moderate-to-high-output fuel systems.
The regulator features -6AN inlet, outlet, and return interfaces.
Correct fittings must be selected according to the manufacturer's port specifications.
Fuel hose, fittings, and adapters must be compatible with the intended fuel and operating pressure.
Broad Fuel Compatibility
The Turbosmart FPRF6 is designed for use with a broad range of automotive fuels.
These include conventional gasoline, ethanol-based fuels, methanol, racing fuels, and aggressive leaded fuels.
The stainless steel valve seat and motorsport-grade diaphragm contribute to durability and compatibility with demanding fuel formulations.
All supporting fuel system components must also be compatible with the selected fuel.
Stainless Steel Valve Seat
The FPRF6 incorporates a stainless steel valve seat.
This component helps regulate the amount of fuel returning to the tank.
Consistent valve operation is important for maintaining stable fuel pressure across changing engine loads and fuel flow conditions.
Motorsport-Grade Diaphragm
The regulator features a motorsport-grade diaphragm designed for responsive pressure regulation.
The diaphragm works with the internal spring and valve assembly to respond to changes in manifold pressure.
Accurate diaphragm response helps maintain the intended fuel pressure differential across the injectors.
1/8-Inch NPT Gauge and Sensor Port
The TS-0404-1522 includes a 1/8-inch NPT port for a compatible fuel pressure gauge or electronic sensor.
This allows fuel pressure to be monitored during installation, tuning, and ongoing operation.
Electronic fuel pressure monitoring can also be integrated into compatible aftermarket engine management systems.
When properly configured, fuel pressure monitoring can help identify fuel delivery problems before they cause severe engine damage.
Return-Style Fuel System Requirements
The FPRF6 is designed for return-style fuel systems.
In this configuration, the regulator controls pressure by bypassing excess fuel back to the tank.
A complete installation may require compatible fuel pumps, fuel rails, supply lines, return lines, fittings, and pressure monitoring equipment.
Vehicles originally equipped with returnless fuel systems may require additional modifications.
Fuel System Tuning Considerations
Changing fuel pressure can affect injector flow and engine fueling.
For this reason, the regulator should be installed and adjusted according to the requirements of the engine management system.
When upgrading a turbocharged or supercharged engine, verify injector calibration, fuel pump capacity, and pressure response under boost.
Professional tuning is recommended for high-output applications.
Turbosmart FPRF Series Comparison
FPRF6 – TS-0404-1522: Integrated fuel pressure regulator and filter designed for compatible -6AN fuel systems.
FPRF8 – TS-0404-1532: Integrated fuel pressure regulator and filter designed for compatible -8AN fuel systems.
FPRF10 – TS-0404-1542: Integrated fuel pressure regulator and filter designed for compatible -10AN fuel systems.
The correct model should be selected according to the fuel system's required flow capacity, plumbing dimensions, and operating conditions.
Common Reasons for Replacement
Inadequate Factory Fuel Pressure Regulation: Upgrades a fuel system requiring adjustable pressure control.
Turbocharger Upgrades: Provides boost-referenced regulation for compatible forced-induction systems.
Supercharger Installations: Supports properly configured return-style fuel systems.
Fuel System Plumbing Simplification: Combines the regulator and filter into one assembly.
Replacing Separate Fuel System Components: Reduces the need for multiple standalone housings.
Fuel Pressure Instability: Provides an upgraded regulator when existing hardware is inadequate or damaged.
E85 Fuel System Upgrades: Suitable for properly configured ethanol-compatible fuel systems.
Performance Engine Builds: Supports upgraded fuel delivery requirements.
Custom Return-Style Fuel Systems: Provides adjustable pressure regulation and filtration.
Damaged Existing Regulator: Replaces a worn or malfunctioning pressure-control component.
Fuel Filtration Upgrades: Provides a washable stainless steel filter element.
Custom K-Series Turbo Builds: Supports aftermarket Honda and Acura fuel system configurations.
Engine Bay Simplification: Reduces the number of separate fuel system components.
Installation Notes
Verify Fuel System Compatibility: Confirm that the FPRF6 is appropriate for the intended return-style fuel system.
Review Turbosmart Instructions: Read the manufacturer's installation and maintenance documentation.
Confirm Fuel Compatibility: Ensure all hoses, fittings, and seals are suitable for the selected fuel.
Disconnect the Battery: Follow appropriate electrical safety procedures.
Relieve Fuel System Pressure: Depressurize the system before disconnecting fuel lines.
Work in a Ventilated Area: Keep ignition sources away from fuel.
Select the Mounting Location: Choose an accessible position away from excessive heat.
Maintain Heat Clearance: Position the regulator away from exhaust manifolds, turbochargers, and other major heat sources.
Identify Fuel Ports: Confirm the inlet, outlet, return, gauge, and pressure reference connections.
Select Correct Fittings: Use fittings compatible with the regulator's port interfaces.
Mount the Assembly: Secure the regulator and filter using an appropriate mounting arrangement.
Connect the Fuel Supply: Route the feed line to the designated inlet.
Connect the Regulated Outlet: Route the outlet according to the fuel system design.
Connect the Return Line: Ensure the return line is correctly sized and unrestricted.
Install a Pressure Gauge or Sensor: Use the 1/8-inch NPT port if required.
Connect the Manifold Reference: Use an appropriate pressure reference source.
Secure Fuel Plumbing: Protect hoses from heat, abrasion, vibration, and moving components.
Inspect the Filter Assembly: Confirm the filter cartridge is correctly installed.
Prime the Fuel System: Activate the fuel pumps according to the vehicle's service procedure.
Check for Leaks: Inspect every fitting before starting the engine.
Set Base Fuel Pressure: Adjust the regulator according to the intended fuel system requirements.
Verify Reference Operation: Confirm that fuel pressure responds correctly to manifold pressure changes.
Start the Engine: Monitor fuel pressure and inspect for leaks.
Check Pump Performance: Verify adequate fuel flow at the required operating pressure.
Confirm ECU Calibration: Ensure injector data and pressure settings are correctly configured.
Perform Controlled Testing: Monitor fuel pressure as engine load increases.
Check for Pressure Drop: Verify that fuel pressure remains stable under high-load conditions.
Service the Filter Regularly: Inspect and clean the filter element at appropriate intervals.
Reinspect All Connections: Check fittings, mounting hardware, and hoses after initial operation.
Use Professional Installation When Necessary: High-pressure fuel system modifications should be performed by qualified personnel.
Important: Do not remove or adjust the regulator's locking collar. Incorrect installation, improper pressure adjustment, or fuel leaks can cause engine damage, fire, or personal injury.
What's Included
(1) Turbosmart FPRF6 Black Fuel Pressure Regulator and Filter Assembly (TS-0404-1522)
(1) Integrated Washable 10-Micron Stainless Steel Mesh Filter Element
Note: This product includes one combined regulator/filter assembly. Fuel hoses, -6AN fittings, mounting brackets, fuel pressure gauges, sensors, and additional installation hardware may need to be purchased separately.
Upgrade your performance fuel system with the Turbosmart FPRF6 Black Fuel Pressure Regulator with Integrated Fuel Filter (TS-0404-1522), engineered to deliver precise fuel pressure control, high-flow filtration, and simplified installation in one compact assembly.
Featuring -6AN inlet, outlet, and return connections, adjustable 35–80 PSI base pressure, true 1:1 boost-referenced regulation, a stainless steel valve seat, motorsport-grade diaphragm, and washable 10-micron fuel filter, the FPRF6 provides the features needed for demanding performance fuel systems.
Whether building a turbocharged K20 or K24 Honda, upgrading an E85-compatible fuel system, or completing a custom street or motorsport project, the Turbosmart TS-0404-1522 delivers the precision, durability, and advanced fuel management technology expected from Turbosmart.
| Part Number: | TS-0404-1522 |
| Brand: | Turbosmart |
| CARB Approved: | No |
Not legal for sale or use in California on any pollution controlled motor vehicles. See http://www.semasan.com/emissions for state by state emissions requirements.
There is a 5% cancellation fee if you order this product and want to ship it to the state of California.
WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects. www.P65Warnings.ca.gov.
Vehicle Fitment
This part does not have vehicle specific fitment. Please contact us if you need assistance.
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