CTZ FLASHBOX

Read, Adjust & Flash Your Own Mopar — Wired or Wireless

2015+ Dodge · Chrysler · Ram · Jeep | Continental GPEC2A ECU

The CustomTunez FlashBox brings our GPEC2A tuning platform to your phone and your laptop. Read, identify, back up, tune, and flash supported Continental GPEC2A engine control modules — from home, no shop visit.

You loved the GPEC2A Tuner and asked for wireless. We listened. One box, two ways to tune:

Wired — plug into your laptop over USB and run the full CustomTunez GPEC2A software. The wire gives you rock-solid timing for flashing.

Wireless — connect from your phone over WiFi with the app. Read, tune & flash with nothing but your phone.

Designed for supported 3.6L Pentastar V6, 5.7L HEMI and 6.4L HEMI applications. Faster and smoother than ever — and this is just the start, with more features already on the way.

Want something more advanced? Read your vehicle and request a custom performance tune directly through the app.

What You Can Do

Read Your ECU — Pull the supported calibration over OBD. Every read is integrity-checked before it's accepted, helping prevent an incomplete or corrupted read from being used for a flash. Your original calibration is automatically kept as a backup.

Adjust Supported Parameters — An easy interface puts supported settings in reach, no binary editing software required:

Rev Limiter — adjust supported Drive and Park/Neutral engine-speed limits

Speed Limiter — adjust the vehicle speed-limiter setting where permitted

Exhaust Sound / Burble — make your own pops and set their duration where permitted

MDS / Cylinder Deactivation — configure supported cylinder deactivation where legally permitted

More options depending on vehicle, application, and intended use

Not every feature is available for every vehicle or jurisdiction. Adjust as often as you like on your licensed vehicle.

Your Garage — Store multiple cars in the app and switch between them anytime. Your reads, tunes and backups, organized by vehicle.

Flash Your Calibration — Write supported calibrations directly to the GPEC2A. The platform verifies ECU and calibration data before any programming begins.

Stock Backup & Restore — Your factory calibration is saved the first time you read. Want to go back? Select the original backup and flash it right back on.

Instant ECU Identification — Identify VIN, Calibration ID, ECU Type, Serial Number and Part Number in seconds. Know exactly what controller you're working with before making changes.

Scan & Clear Codes — Run a diagnostic scan and clear stored trouble codes once the underlying condition has been addressed — no separate scan tool or shop visit. Clearing a code does not repair the condition, and codes return if the condition is still present.

Request a Custom Tune — Read your vehicle and submit the calibration to Custom Tunez with your mods and goals. We'll build a calibration appropriate for the supported vehicle and intended application, subject to applicable emissions and vehicle regulations.

Compatibility

Designed for supported 2015+ Dodge, Chrysler, Ram and Jeep vehicles with the Continental GPEC2A ECU, including selected:

3.6L Pentastar V6

5.7L HEMI V8

6.4L HEMI V8

6.2L HEMI V8

Applications may include: Ram 1500 / 2500 / 3500, Dodge Charger, Dodge Challenger, Dodge Durango, Jeep Grand Cherokee, and other supported GPEC2A vehicles.

Compatibility is determined by ECU type and calibration, not simply vehicle year/model.

ECU Access Requirements

2015–2017: certain applications may require a one-time ECU unlock.

2018+: certain applications require an appropriate security-gateway / bypass solution for authorized ECU programming.

Not sure which you need? Contact Custom Tunez with your year, make, model and engine.

What's In The Box

CustomTunez FlashBox

OBD-II connection cable

GPEC2A Tuner app + software access

In-app Garage for your vehicles

Built-in scan & clear

Stock calibration backup / restore

2018+ gateway / security-gateway hardware: included or available separately depending on the package selected.

Important Emissions & Legal Notice

The CustomTunez FlashBox and GPEC2A Tuner are a vehicle calibration and programming platform. They are not intended to bypass, defeat, disable, or render inoperative any emissions-control system required by federal, state, provincial, or local law.

Custom Tunez does not authorize the removal or disabling of catalytic converters, oxygen-sensor monitoring, evaporative-emissions systems, emissions-related diagnostic functions, or other legally required emissions-control equipment. Users are responsible for ensuring that vehicle modifications and calibrations comply with all laws and regulations applicable to the vehicle and its location. Certain calibration features may be restricted to applications where their use is lawful.

Competition / Off-Road Applications — Certain features may be offered separately for dedicated competition or other lawful non-highway applications, where permitted. A vehicle originally certified for highway use does not automatically become exempt from emissions requirements merely because it is described as "off-road" or "competition use."