RennTech ECU+ Upgrade 2016-2021 Mercedes-Benz AMG GT C190

The 2016-2021 AMG GT responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This ECU+ Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 4.0L M178 twin-turbo V8, so the extra power arrives across the whole rev range without giving up everyday drivability. RennTech rates the AMG GT at up to 601 hp and 582 lb-ft with this upgrade, a gain of 95 hp and 115 lb-ft.

Watch it explained

Features

• Loaded through the RennTech HHT hand-held tuner via the OBD2 port, no ECU removal
• The HHT stores the tuned and the factory file, so you can switch back to stock any time
• Revised ignition timing, throttle mapping, air-fuel ratios and boost control
• Gains across the entire rev range, not just at peak
• Developed on RennTech's own dyno and road tested
• Keeps factory-like drivability and reliability for daily use
• 93 octane or better recommended for the full calibration
• RennTech lists a CARB Executive Order for this calibration

What is included

• RennTech calibration for your car
• Delivery as listed by RennTech for this model (HHT tuner or ECU flash)

Specs

Fitment notes

For the AMG GT (C190), 2016-2021. Please include your VIN with the order so RennTech can confirm the exact application. The full calibration needs 93 octane or better fuel. Check the fitment table before ordering, and contact us if your car differs.

Fitment