Wisher Performance AuxJection Kit | 2022-2026 Cadillac CT5-V Blackwing
Wisher Performance AuxJection for the 2022-2026 Cadillac CT5-V Blackwing
AuxJection is a factory-ECU-integrated supplemental fuel-injection system for the supercharged 6.2L LT4 in the CT5-V Blackwing. It adds two port-style injectors without an external controller or piggyback.
Verified compatibility
- 2022-2026 Cadillac CT5-V Blackwing, 6.2L supercharged
- Wisher lists compatibility with the stock LT4 supercharger, Whipple 3.0, and Magnuson 2650 platforms. This SMG listing currently provides selectable configurations for the stock LT4 and Magnuson 2650.
- Stock throttle body through 103mm bore
- Stock throttle body and stock intake fit without modification
- JLT 5-inch intake with a 103mm throttle body requires Wisher's 5-inch-to-103mm low-profile coupler
- Fitment is guaranteed with the stock belt drive and TooHighPSI Slayer; other idler-relocation arrangements may create clearance issues
The assembly adds approximately one inch at the supercharger inlet. Other large-tube intake combinations may require modification and are not guaranteed.
How it works
Custom ECU software uses live ECU data to command the auxiliary injectors. The included fuel-line arrangement shares the factory low-pressure circuit without modifying the original hard lines.
Important requirements
- A custom tune file from Wisher is required; typical stated turnaround is 1-3 business days.
- The first flash must be performed as a “Write Entire.”
- An HP Tuners MPVI4 interface is required to flash and tune this system. It is not included with the AuxJection kit.
- Select whether you already have a flex-fuel sensor or need one included, then choose aluminum or black-anodized finish.
- Do not use VP Import, Q16, or other MTBE-oxygenated fuels.
Required Tuning Hardware
Need an MPVI4? Add the HP Tuners MPVI4 at the same time as your AuxJection kit so you have the hardware required for the initial Write Entire and future tuning/logging.
HP Tuners licensing/credits may be required separately based on the vehicle and calibration.
SMG has a production kit inbound for hands-on installation, testing, and original shop content.
Processing & Shipping Overview
Processing occurs before shipping.
Most in-stock items typically process within 2–3 business days before shipment or pickup. Expedited shipping options affect transit time after an order ships and do not speed up processing.
Made-to-order, special-order, vendor drop-ship, and freight items require additional processing time before shipping. Any extended lead times will be noted on the product page when applicable.
For the most up-to-date order status or lead time questions, please contact sales@smgspeed.com or use live chat during business hours.