AuxJection - LT4 - 103mm

NOT FOR SWAP VEHICLES

This is for vehicle specific applications. You must use these on the vehicles listed in the drop down menu below.

Need more fueling than the LT4 DI system can support, but don’t want to rely on meth injection or invest in a full port-injection setup?

AuxJection fills the gap with a clean, factory-style solution that installs easily and integrates seamlessly with the ECU

HOW IT WORKS

AuxJection is a fully integrated auxiliary fuel-injection solution engineered to work within your vehicle's factory ECU—no external controllers, piggybacks, or stand-alone controllers required. By utilizing custom ECU software (detailed instructions provided in your kit) that gets written to the ECU, AuxJection drives additional port-style injectors with the same precision you would expect from the stock controller.

AuxJection's internal calibration logic uses real-time ECU data to calculate and deliver auxiliary injector pulse width on the fly when a user-specified duration of direct injection window is met. After installation, the vehicle tunes no differently than if it were equipped with a higher-capacity fuel system from the factory.

The included fuel line set reroutes the low-pressure feed from the DI system at the firewall, through the throttle-body assembly, and returns it to the DI system inlet—allowing the auxiliary system to share the OEM low-pressure circuit without modifying factory hard lines. The plug-and-play harness combined with the pre-made fuel lines make this kit the EASIEST installing product on the market for adding an auxiliary fuel source.

COMPATIBILITY:

• Only compatible with stock supercharger LT4 platforms
• This system adds approximately one inch to the supercharger snout
• Depending on your intake, minor tube or coupler modifications may be required
• This product does not fit Camaro ZL1 with a standard Roto-Fab intake
• Roto-Fab Big Gulp and JTL large tube intakes can be used with modifications
• Refer to the "ZL1 Intake Modification Guide" for instructions
• DO NOT use with VP Import, Q16, or other MTBE oxygenated fuels

➞ View Product Disclaimer

EACH KIT INCLUDES:

• Billet throttle-body flange with matching fuel rail (compatible with stock throttle body up to 103mm bore)
• (2) FID2200 Injectors - flow-matched pair
• Pre-assembled, crimped PTFE AN fuel lines with all required fittings
• Plug-and-play wiring harness

➞ Download the full installation guide here

IMPORTANT NOTE:

Custom ECU software is REQUIRED. In your kit, you'll receive detailed instructions and information needed to generate your custom software file. This system WILL NOT function until the modified software is written to the ECM. *Tools for flashing the ECM are not included.

⚠️ California Proposition 65 Warning