Race Ready Tuning RTD4 Tuning & Diagnostics Device

The Race Ready Tuning RTD4 is the next-generation remote calibration interface that brings cutting-edge tuning technology to late-model vehicles. Engineered for seamless performance updates, it’s now mandatory for tuning all new HP Tuners releases.

In addition to a tuning device, every vehicle requires a specific number of HP Tuners Licensing Credits in order to unlock and tune the vehicle’s modules. Customers who need credits added to their RTD device can choose the exact number of credits needed from the drop-down menu during checkout.

If you are unsure how many credits your vehicle requires, please visit:
HP Tuners Vehicle Credit Lookup

Please note that most vehicles require credits for multiple modules, including but not limited to the ECM (Engine Control Module) and TCM (Transmission Control Module). It is extremely important to ensure that you purchase the correct total number of credits required for all modules you intend to tune prior to placing your order.

Key Features:

• Equipped with onboard Wi‑Fi (and Bluetooth support via the TDN app), RTD4 delivers faster tune transfers and streamlined remote diagnostics through your smartphone 
• Connect your iPhone or Android device using the free HP Tuners TDN (Tune Delivery Network) app on the App Store or Google Play. Read stock files, upload data logs, flash professionally tuned calibrations, and clear DTCs—without needing a laptop 
• RTD4 supports over 300 vehicle controllers, a significant expansion over previous generations, ensuring broad compatibility across modern vehicles
• Simply plug into the OBDII port—no ECU removal, no USB cables. Tuning is now as easy as parking, pairing, flashing, and driving
• Fully integrates with HP Tuners’ VCM Scanner software, allowing robust diagnostic and data logging functionality while keeping the tune itself secure

What’s Included:

• RTD4 OBDII hardware module
• Free access to the TDN mobile app
• Compatibility with HP Tuners credits for tune deliveries
• No additional PC software required for flashing 

Why RTD4 Matters:

From 2024 onwards, RTD4 is the exclusive interface required for tuning all new C8 Corvette Models, as well as Late Model GM, Mopar and Ford vehicles. It’s not just compatible - it’s crucial for harnessing the latest HP Tuners developments.

Experience Smarter, Smoother Tuning

With the RTD4, ditch the laptop and enjoy full wireless capabilities. From reading and uploading data all the way to flashing tunes and clearing codes—the entire process is controlled effortlessly via your smartphone. Built for installers, shops, and remote calibration professionals, RTD4 is the ultimate link between your vehicle and expert tuners - whether you're on the track, at the trail, or at home.