RENNtech R3 Performance Package for G-class G 55 [W463]




RENNtech’s R3 Performance Package for the G 55 is the ultimate upgrade for your Mercedes 55 series AMG Kompressor!

The R3 performance package includes everything found in package R1 & R2 with the addition of our stainless steel long tube headers for more performance and sound in addition to our transmission performance upgrade.

The ECU tune is installed using RENNtech’s HHT (Hand Held Tuner) gives you the ability to switch between “Tuned” and “Stock” ECU programs as often as needed with no ECU removal!

RENNtech’s proprietary tuning module stores both the RENNtech “tuned” file and your vehicle’s “stock” program. The module plugs directly into the OBD2 port and delivers the file you choose directly to the ECU. Programming only takes a few minutes.  The vehicle can be re-flashed at any time, and as many times as you wish.

R2 Performance Package:

  • RENNtech HHT – Hand Held Tuner ECU Upgrade
  • RENNtech Crankshaft Pulley
  • RENNtech Full Carbon Fiber Airbox
  • 82mm Throttle Body Upgrade
  • RENNtech High Flow Intercooler Pump

Stock Performance:

493 HP @ 5500 RPM
516 LB-FT @ 2650-4800 RPM

Modified Performance:

600 HP @ 6100 RPM
631 LB-FT @ 3600 RPM


+107 HP
+115 LB-FT

RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid-1980’s. Their experience, countless hours of in-house research & development, and extensive testing ensure that their proprietary ECU upgrades offer incredible performance gains and rock solid reliability.

RENNtech tuning software for Mercedes offers significant gains in horsepower and torque across the entire power band. By modifying ignition timing and throttle mapping, optimizing air/fuel ratios, increasing the engines rev limiter, and modifying boost mapping for turbocharged vehicles, RENNtech’s performance software will unleash your Mercedes true potential.

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