RENNtech ECU+ Upgrade | V167 | GLE 63 AMG EQ Boost | 745HP / 767LB-FT | 4.0L V8 BiTurbo EQ Boost | M177 | MY2021-2023 mercedes-benz-sl-class--232---2022-present--sl-55-amg-biturbo-esr7979792 R2 Performance Package for 199

R2 Performance Package for 199 - SLR McLaser

6 at 5150 rpm           max

Rated by RENNtech:               480 HP @ 5

RENNtech Stainless Steeel Sound and Performance Pipes for 211 - E 55K AMG and 63 AMG

Our proprietary ECU upgrade for the Mercedes M277 engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability

RENNtech ECU+ Upgrade | V167 | GLE 63 AMG EQ Boost | 745HP / 767LB-FT | 4.0L V8 BiTurbo EQ Boost | M177 | MY2021-2023 mercedes-benz-sl-class--232---2022-present--sl-55-amg-biturbo-esr7979792 R2 Performance Package for 199ECU+ Upgrade Up to 745 HP 767 LB FT Gains: +97 HP & +54 LB FT RENNtech HHT (Hand Held Tuner) allows you the unlimited ability to switch between tuned and stock ECU programming without ECU removal! RENNtechs proprietary tuning module contains both the Tuned file as well as 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