RB26DETT and RB25DET engines in the R32, R33, and R34 Skyline GT-R require precise fuel pressure regulation when running upgraded fuel systems or higher boost levels. The Radium Engineering RB26/25 FPR Adapter (20-0303) is a high-quality anodized aluminum component that allows easy installation of an aftermarket fuel pressure regulator while maintaining compatibility with Radium fuel rails. This adapter features an 8AN ORB connection and 11mm bore, ensuring optimal flow and secure integration for high-performance setups.
The adapter supports the use of a fuel pulsation damper (sold separately), which is essential for stabilizing rail pressure with high-flow injectors. By absorbing pressure pulses caused by injector opening and closing, it helps prevent unstable fuel pressure, erratic idle, and surging — common issues in modified RB26 and RB25 builds. This results in more consistent delivery and improved tuning accuracy across the RPM range.
At Terra Firma Automotive, we supply this genuine Radium Engineering RB26/25 FPR Adapter as a premium fuel system component for RB26DETT and RB25DET owners seeking better pressure control and flexibility. It works seamlessly with Radium fuel rails and supports E85 and other performance fuels, providing the reliability and precision needed for high-output builds. For enthusiasts serious about fuel system optimization, this adapter is one of the most effective upgrades you can make to your Skyline.
- Radium Engineering RB26/25 FPR Adapter with 8AN ORB connection
- 11mm bore for optimal fuel flow
- Anodized aluminum construction for durability and corrosion resistance
- Allows installation of aftermarket fuel pressure regulators
- Supports optional fuel pulsation damper for stable rail pressure
- Reduces erratic idle and surging with high-flow injectors
- Compatible with E85 and all performance fuels
- Designed for Radium fuel rails on RB26DETT and RB25DET
- Improves tuning accuracy and fuel pressure consistency
- Essential component for high-boost and high-power RB builds
- Premium Radium engineering with proven real-world results
- Direct upgrade for R32, R33, and R34 GT-R fuel systems
- Enhances overall fuel system flexibility and performance
- Trusted by Skyline enthusiasts for quality and reliability
- ⚠️ Emissions / California Legal Disclaimer – Off-Road / Competition Use Only: This product is intended for off-road, competition, and track use only. It is not legal for sale or use on public roads or highways in California (or any other CARB-adopting state). For more information Click Here.
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