During periods of engine build tours there will be a delay in delivery with tunes. Please allow 1-5 business days.

*PLEASE UPDATE YOUR EK1 DEVICE IN ORDER TO FLASH EKR FILES*

KJT AFTERBURNER. The successor to Booster, our original full ECU calibration for the stock turbo 3.3T.

Booster set the standard for stock turbo Stingers and G70s. Afterburner is what years of customer datalogs, revisions and track time turned it into. Everything Booster delivered is here, rebuilt on a new calibration foundation, and the file now does something Booster never could: it learns.

Why Afterburner replaces Booster

Adaptive calibration. Booster was a fixed file built for one fuel. Afterburner reads the fuel in the tank, from premium through E50, and corrects the mixture on its own within about 15 minutes of normal driving after a fill-up. Timing works the same way: the calibration advances while combustion stays clean, pulls back the instant it does not, and earns it back afterwards. One file, every pump.

Boost control engineered for the factory chargers. Boost targets, wastegate strategy and the airflow ceiling were rebuilt around what the stock turbos actually deliver, so the car reaches its target and holds it through the pull instead of tapering off.

Faster spool. Wastegate behavior in the spool region was recalibrated so boost arrives sooner at full pedal.

Drive modes with purpose. Eco and Comfort run reduced boost for daily driving. Sport delivers the full calibration.

Full ECU drivability. Sharpened throttle response, drive-off limiter removed for clean launches, raised rev limit, speed limiter removed, optimized top end cam timing, shift pops on hard upshifts, start-up blip.

No fuel selection at checkout. One file covers premium through E50 and adapts to what you run.

Burbles: Moderate suits most exhaust setups. Mild is barely audible. Aggressive is for full race exhaust only.

Supporting mods: high-flow downpipes recommended. Head studs strongly recommended above 500 whp.

After the flash: reset adaptive values once with the EK1, then leave it alone. Give it 15 minutes of normal driving after a fill-up before your first hard pull.

*Will need EK1 device to upload tunes to your ecu*

Be sure you have bootpatched under your OEM calibration and have the full OEM file and or Recovery file.

Disclaimer: By purchasing a tune from Kim Jong Tuned Performance, you acknowledge that custom ECU calibrations are provided as is and are intended for off-road or motorsports use only (where applicable by law). Kim Jong Tuned Performance is not responsible for any damage, drivability issues, or mechanical failure resulting from the installation or use of any tune. It is the customer's responsibility to ensure their vehicle is mechanically sound and properly maintained prior to tuning. All sales are final.