Radium Engineering RB25DET Non NEO Top Feed Fuel Rail Kit 20-0277

RB25DET engines in the R33 Skyline GTS-T benefit from upgraded fuel rails when running larger top-feed injectors or higher boost levels. The Radium Engineering Top Feed Fuel Rail Kit (20-0277) is a direct bolt-on upgrade that converts the OEM side-feed setup to top-feed, allowing the use of high-flow 14mm O-ring injectors for improved fuel delivery and tuning flexibility. Manufactured with a large 0.69" internal bore and CNC machined from solid 6063 aluminum with a black anodized finish, this rail supports substantial power requirements while providing excellent strength and a clean, professional engine bay appearance.

The rail features four 8AN ORB ports for flexible inlet, outlet, and accessory plumbing, and includes phenolic spacers, washers, stainless steel mounting bolts, and injector seats for a complete, ready-to-install solution. It is fully compatible with E85 and other performance fuels, making it ideal for both street and track builds. The kit also allows reuse of the factory fuel pressure regulator with the optional adapter (20-0303).

At Terra Firma Automotive, we supply this genuine Radium Engineering RB25DET Non NEO Top Feed Fuel Rail Kit as a premium fuel system upgrade for R33 GTS-T and compatible Stagea owners. It transforms your fuel delivery into a strong, efficient system that supports your modified RB25DET engine while maintaining a high-end look. For enthusiasts serious about fuel system optimization and maximizing power potential, this Radium fuel rail is one of the most effective upgrades you can make to your Skyline.

 

• Radium Engineering RB25DET Non NEO Top Feed Fuel Rail Kit for R33 GTS-T
• Converts OEM side-feed to top-feed for 14mm O-ring injectors
• Large 0.69" internal bore for high-flow fuel delivery
• CNC machined from 6063 aluminum with black anodized finish
• Four 8AN ORB ports for flexible plumbing options
• Includes phenolic spacers, washers, stainless steel bolts, and injector seats
• Compatible with E85 and performance fuels
• Optional adapter for factory fuel pressure regulator reuse
• Direct bolt-on fitment for R33 GTS-T and compatible Stagea
• Enhances fuel pressure stability and supports high-power builds
• Premium Radium engineering with proven real-world results
• Clean, professional black anodized appearance in the engine bay
• Essential upgrade for high-boost and high-horsepower RB25DET builds
• Trusted by Skyline enthusiasts for quality and performance
  
• Fits Series 1 Stagea with RB25
• ⚠️ 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.