HP Tuners RTD4 OBD-II Remote Tuning Device (ECU Already Unlocked)

If your ECU is already unlocked, the HP Tuners RTD4 is the easiest way to flash custom calibrations, record vehicle data, and receive remote tuning updates without visiting a dyno or tuning shop. Designed and manufactured by HP Tuners, the RTD4 connects directly to your Corvette's OBD-II port and communicates wirelessly with the HP Tuners Tune Delivery Network (TDN), making remote tuning faster, simpler, and more convenient than ever.
Whether you're installing a custom ECU tune for improved performance or logging data for future revisions, the RTD4 provides everything needed to communicate with your tuner from virtually anywhere.
Features

Genuine HP Tuners RTD4 Remote Tuning Device
Designed for vehicles with an already unlocked ECU
Wireless tuning and calibration flashing through Wi-Fi
High-speed standalone data logging
Fast transfer speeds for quicker tune uploads and downloads
Simple plug-and-play OBD-II connection
Secure, redesigned OBD-II connector for improved fitment
Works with the HP Tuners Tune Delivery Network (TDN)
Compatible with thousands of supported vehicles and platforms
Compact and portable design

Why Choose the HP Tuners RTD4?
The RTD4 allows you to receive custom tuning updates remotely without needing a laptop connected to your vehicle. Simply connect the device, communicate with your tuner through the HP Tuners Tune Delivery Network, and flash updated calibrations directly to your vehicle.
Its improved hardware also allows for faster wireless communication and high-speed data logging, giving tuners the information they need to fine-tune your vehicle for maximum performance.
High-Speed Data Logging
The HP Tuners RTD4 features increased processing power, expanded memory, and higher bandwidth for faster and more detailed vehicle data logging.
Benefits include:

Record more engine and transmission parameters
Faster logging speeds
Improved tuning accuracy
Better remote diagnostic capabilities
Performance comparable to many wired logging setups

Easy Remote Tuning
Using the HP Tuners Tune Delivery Network (TDN), your tuner can:

Send updated calibrations remotely
Review vehicle data logs
Make calibration revisions
Continue optimizing your tune without requiring an in-person appointment

This makes the RTD4 ideal for enthusiasts running custom engine modifications, forced induction, bolt-on upgrades, or flex fuel setups.
What's Included

HP Tuners RTD4 OBD-II Remote Tuning Device
HP Tuners Universal Credits (based on selected option)
USB Cable
Quick Start Documentation

Vehicle Fitment
Fits:

2020 Chevrolet Corvette C8 Stingray
2021 Chevrolet Corvette C8 Stingray
2022 Chevrolet Corvette C8 Stingray
2023 Chevrolet Corvette C8 Stingray
2023 Chevrolet Corvette C8 Z06
2024 Chevrolet Corvette C8 Stingray
2024 Chevrolet Corvette C8 Z06
2024 Chevrolet Corvette C8 E-Ray
2025 Chevrolet Corvette C8 Stingray
2025 Chevrolet Corvette C8 Z06
2025 Chevrolet Corvette C8 E-Ray
2025 Chevrolet Corvette C8 ZR1
2026 Chevrolet Corvette C8 Stingray
2026 Chevrolet Corvette C8 Z06
2026 Chevrolet Corvette C8 E-Ray
2026 Chevrolet Corvette C8 ZR1

Engine Option:

6.2L LT2 (Stingray & E-Ray) – 8 HP Tuners Universal Credits

Important Information

Requires an already unlocked ECU. This device does not unlock your ECU.
Designed for use with the HP Tuners Tune Delivery Network (TDN).
Internet access is required for remote tune delivery and updates.
Universal Credits are vehicle-specific once licensed.
Compatible with custom remote tuning services using HP Tuners-supported calibrations.