HomeAir and Fuel Delivery > Fuel Injection System and Related ComponentsStandard Ignition PR548 Fuel Injection Pressure Regulator
Part #: PR548

Standard Ignition PR548 Fuel Injection Pressure Regulator

⚙️ 4 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Subaru, Impreza
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Overview of Standard Ignition Fuel Injection Pressure Regulator PR548

The Standard Ignition PR548 fuel injection pressure regulator is designed specifically for Subaru Impreza models. This adjustable, return-type regulator ensures precise fuel pressure control for gas fuel systems, helping maintain optimal engine performance and efficiency.

  • Adjustable fuel pressure regulator for precise tuning
  • Constructed from durable steel with a chrome and silver finish
  • Includes two inlet ports and one outlet port with a reference port
  • Bolt mount design for secure and straightforward installation
  • New, not remanufactured, ensuring reliable performance

Detailed Product Description

The Standard Ignition PR548 is a fuel injection pressure regulator engineered for gas fuel systems in Subaru Impreza vehicles. Featuring a return-type design, this regulator maintains consistent fuel pressure by regulating excess fuel back to the tank. Made from robust steel, the regulator is finished in chrome and silver to resist corrosion and wear. It includes two inlet ports and one outlet port, along with a reference port to ensure accurate pressure feedback. The bolt mount installation type allows for a secure fitment, minimizing the risk of leaks or misalignment. This part is new and built to meet OEM specifications, providing dependable operation for your Subaru Impreza's fuel injection system.

Common Applications and Issues Addressed

  • Maintains stable fuel pressure for consistent engine performance
  • Prevents fuel pressure fluctuations that can cause rough idling or stalling
  • Helps avoid fuel leaks due to worn or faulty regulators
  • Supports proper fuel delivery to improve fuel efficiency
  • Reduces risk of engine hesitation or power loss under load

Installation Notes and Tips

  • Ensure compatibility with Subaru Impreza models before installation
  • Use appropriate tools to remove the old regulator and install the PR548 securely
  • Check all fuel lines and connections for leaks after installation
  • Adjust the regulator pressure as needed to match vehicle specifications
  • Follow vehicle service manual guidelines for fuel system maintenance

Quality Assurance and Warranty

The Standard Ignition PR548 fuel injection pressure regulator is manufactured to meet or exceed OEM standards for fit, form, and function. As a new part, it undergoes quality control inspections to ensure reliability and durability. While specific warranty details may vary, Standard Ignition products typically come with a limited warranty against defects in materials and workmanship, providing confidence in your purchase for Subaru Impreza fuel system repairs.

BrandStandard Ignition
Part NumberPR548
AdjustableYes
Automotive Performance ItemNo
ContentsRegulator
Fuel TypeGas
FunctionsRegulator
MaterialSteel
Mounting TypeBolt Mount
New or RemanNew
Number of outlets1
Part FinishChrome
Reference Port IncludedYes
Regulator FinishSilver
Regulator MaterialSteel
TypeReturn

This part fits 4 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersPositionNotes
2011SubaruImprezaWRX STI2.5LH4N/A
2011SubaruImprezaWRX STI Limited2.5LH4N/A
2010SubaruImprezaWRX STIN/A
2010SubaruImprezaWRX STI Special EditionN/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

2-19911622670AA44024256800-660PRDL660

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.