Description

The Radium Engineering Fuel Rail for the Toyota GR Corolla and GR Yaris is a high-performance billet aluminum upgrade designed to support increased fuel flow, advanced fueling configurations, and high-horsepower builds on the G16E-GTS platform.

The factory fuel rail is engineered for stock power levels and limited fueling flexibility. As power, boost pressure, and injector demands increase, the OEM rail can become a limiting factor in fuel delivery and system expandability. The Radium fuel rail addresses these limitations with a motorsport-grade design that supports aftermarket injectors, custom fuel systems, and return-style configurations while maintaining OEM-level fitment.

Unlike generic aftermarket rails, the Radium unit is purpose-built for the G16E-GTS engine and installs cleanly under the factory engine cover. It features a large internal bore, multiple -AN port options, and compatibility with factory sensors when used with the optional plumbing kit.

This makes it an ideal upgrade for GR Corolla owners building anything from a mildly modified street car to a fully built high-boost or ethanol-fueled setup.

Two Ways to Configure This Fuel Rail

This product can be configured in two different ways depending on your build goals:

1) Fuel Rail Only – Custom Fuel System Setup

The base fuel rail includes the billet rail and mounting hardware. This option is ideal for builders who plan to run custom -AN fuel lines, aftermarket regulators, or fully customized fuel systems.

Key benefits:

• Multiple 6AN and 8AN ORB ports for flexible plumbing

• Large internal bore for increased fuel flow

• Support for custom return-style fuel systems

• Compatibility with aftermarket injectors

This configuration is best suited for advanced builds and custom fueling setups.

2) Fuel Rail + Optional Plug-and-Play Plumbing Kit (Recommended)

When paired with the optional 20-0766-PK Fuel Rail Plumbing Kit, the Radium fuel rail becomes a plug-and-play upgrade that integrates directly with the factory G16E-GTS fuel system.

The plumbing kit includes all required fittings and adapters to connect the fuel rail to the OEM fuel feed line and factory fuel pressure sensor, eliminating the need for custom plumbing.

This option is ideal for GR Corolla owners who want a clean, OEM-style installation without custom fuel line fabrication.

Important Note About the Plumbing Kit

The Radium fuel rail does not connect directly to the factory fuel system on its own.

To make the fuel rail plug-and-play with the OEM G16E-GTS fuel system, the optional 20-0766-PK Fuel Rail Plumbing Kit must be selected.

If you are building a custom fuel system with -AN lines and aftermarket components, the plumbing kit is not required.

Key Features and Benefits

• CNC-machined billet aluminum construction

• Anodized finish for corrosion resistance and durability

• Large internal bore for increased fuel flow

• Multiple 6AN and 8AN ORB ports for flexible fuel system design

• Compatible with OEM and aftermarket injectors

• Supports custom return-style fuel systems

• Fits under the factory engine cover

• Direct bolt-on mounting for GR Corolla and GR Yaris

• No special tools required for installation

What’s Included

Fuel Rail Only (Base Option)

• Billet aluminum fuel rail

• Mounting hardware

Optional Plug-and-Play Plumbing Kit (20-0766-PK)

• Adapter fittings for OEM fuel feed line

• Fuel pressure sensor adapter

• Port plug fittings

• Hardware required for OEM integration

Fitment

• Toyota GR Corolla (2023+)

• Toyota GR Yaris (2021+)

• Engine: Toyota G16E-GTS

Why Upgrade the GR Corolla Fuel Rail?

The GR Corolla’s G16E-GTS engine uses a sophisticated dual-injection system and high-pressure fueling architecture, which works well at stock power levels but can become restrictive as fueling demands increase.

Upgrading to a billet aluminum fuel rail provides:

• Increased fuel flow capacity

• Improved reliability under high boost

• Support for larger injectors and ethanol blends

• Greater flexibility for future modifications

• Motorsport-grade durability

For GR Corolla owners planning turbo upgrades, ethanol fueling, or high-power builds, a performance fuel rail is a foundational upgrade.

Radium vs OEM vs Aftermarket Fuel Rails

OEM Fuel Rail

• Designed for stock power levels

• Limited fueling flexibility

• Not optimized for high-power builds

Generic Aftermarket Rails

• Often require custom fabrication

• Inconsistent fitment and sensor compatibility

• Limited engineering integration

Radium Engineering Fuel Rail

• Designed specifically for the G16E-GTS platform

• Motorsport-grade billet construction

• Optional plug-and-play OEM integration

• Supports both custom and OEM-style fuel systems

Is This Upgrade Worth It for Street Builds?

Yes. Even for street-driven GR Corollas, the Radium fuel rail provides:

• Future-proof fueling capability

• Improved reliability

• Clean engine bay integration

• Support for progressive performance upgrades

For track and high-boost applications, the benefits become even more significant.

Installation Information

Installation is quick and straightforward using factory mounting threads, with no cutting or drilling required.

For step-by-step instructions, view the official installation guide here:
➡️ Installation Instructions (PDF)

Frequently Asked Questions

Does this fuel rail work with factory injectors?
Yes. The Radium fuel rail is compatible with OEM injectors and aftermarket injectors designed for the G16E-GTS platform.

Do I need the plumbing kit?
You only need the plumbing kit if you want a plug-and-play connection to the factory fuel system. It is not required for custom -AN fuel setups.

Is this product E85 compatible?
Yes. The fuel rail is compatible with ethanol-based fuels when used with appropriate system components.

Does this require tuning?
Upgrading the fuel rail alone does not require tuning, but tuning is typically required when installing larger injectors or modifying the fuel system.

Is installation difficult?
Installation is straightforward for experienced installers. The plug-and-play plumbing kit significantly simplifies installation.