ECU+ Upgrade | Up to 731 HP / 786 LB-FT | Gains: +88 HP & +65 LB-FT

RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal!

Our proprietary tuning module stores both the RENNtech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose directly to the ECU. Programming takes only a few minutes and the vehicle can be reflashed at any time as many times as you wish.

RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980s! Our experience, countless hours of in-house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver reliability.

RENNtech tuning software for Mercedes offers significant gains in horsepower and torque across the vehicle's entire power band. By modifying ignition timing and throttle mapping, optimizing air-to-fuel ratios, increasing the engine's rev limiter and modifying boost mapping for turbo-charged vehicles, RENNtech performance software unleashes the true potential of your Mercedes.

With the proprietary RENNtech ECU Tuning the W463 - G63 AMG gains up to +88 HP and +66 LB-FT (+75 WHP and +56 WTQ), based on power numbers measured by RENNtech. Please note that the Mercedes M177 engine performance when measured, obtains higher numbers than rated from factory. The maximum power number reached with the RENNtech ECU Upgrade for the G63 AMG is 731 HP and 786 LB-FT.

Notes:

We have found the M177 engine stock performance numbers vary from the baseline figures claimed by Mercedes-Benz. We typically see higher baseline numbers than claimed by the factory.
Power gains are calculated based on stock numbers measured by RENNtech. Crank Performance Numbers are calculated with a 16% Drivetrain loss on SUV's.
Numbers published by MBUSA are an average over a 750rpm range for HP and a 2,000rpm range for TQ. Power gains are calculated based on the peak stock performance measured by RENNtech.
Our numbers will be dependent on conditions and fuel quality. 93+ Octane gasoline is mandatory with this Performance Upgrade.
States known for poor fuel quality have to be supplied with a lower power setup. Please call for details and Race fuel options +1-561-845-7888.

Performance Numbers Overview

G63 AMG (MY2019+ | W463 | M177 | 4.0L V8 BiTurbo) Stock Performance (at crank):

Rated by Mercedes-Benz (peak.): 577 HP @ 6,000rpm; 627 LB-FT @ 2,500-3,500rpm
Dyno measured by RENNtech (peak): 642 HP @ 6,050rpm; 720 LB-FT @ 3,250rpm
- Note: Mercedes M177 engine performance when measured on the dyno obtains higher power numbers than rated from factory. Performance numbers published by MBUSA are a calculated average within a specific rpm range, which obviously result in lower power numbers than at the peak. HP and TQ gains calculated by RENNtech are always based on peak stock results measured by RENNtech and upgraded peak results measured by RENNtech.
- For transparency and comparability, RENNtech published the average stock power during the rpm range set by MBUSA and the peak stock performance

G63 AMG (MY2019+ | W463 | M177 | 4.0L V8 BiTurbo) Modified Performance (at crank):

Rated by RENNtech (peak @crank): 731 HP @ 6,100rpm; 786 LB-FT @ 3,600rpm
Rated by RENNtech (peak @wheel): 614 whp @ 6,100rpm; 660 wtq @ 3,600rpm

Crank Performance Numbers are calculated with a 16% Drivetrain loss on SUV's vehicles.

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