RENNtech Intermediate ECU Upgrade | R231 | SL 63 AMG | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2012-14 mercedes-benz-sl-class--232---2022-present--sl-63-amg-biturbo-esr6220778 This rear spoiler is a

This rear spoiler is a fully functional aerodynamic component as well as an aggressive exterior enhancement on the muscular CLS

000rpm Note: Mercedes M133 engine performance when measured

RENNtech offers OEM replacement for the retractable factory spoiler along with deactivation module

221 - S 63 AMG

up to an astonishing 428 HP and 417 lb/ft at the crank

RENNtech Intermediate ECU Upgrade | R231 | SL 63 AMG | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2012-14 mercedes-benz-sl-class--232---2022-present--sl-63-amg-biturbo-esr6220778 This rear spoiler is aIntermediate ECU Upgrade Up to 638HP 695TQ Gains: +75HP +101TQ 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