RENNtech Intermediate ECU Upgrade | R231 | SL 63 AMG | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2015+ mercedes-benz-sl-class--231---2012-2016--sl-65-amg-biturbo-esr8588212 the functionality is fully optimized

the functionality is fully optimized when combined with the RENNtech front canards

OEM Fixed Wing Base for Coupes: SKU:88

our turbo upgrade kit includes the RENNtech ECU Upgrade and high-performance air filter

CLASS E SW (S 210) 300 TD (HP: 177 | Year: 97 > 99)

Advantages of RENNtech’s EVM:

RENNtech Intermediate ECU Upgrade | R231 | SL 63 AMG | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2015+ mercedes-benz-sl-class--231---2012-2016--sl-65-amg-biturbo-esr8588212 the functionality is fully optimizedIntermediate ECU Upgrade Up to 638HP 695TQ Gains: +33HP +25TQ 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