RENNtech ECU+ Upgrade | R231 | SL 63 AMG | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo

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RENNtech ECU+ Upgrade | R231 | SL 63 AMG | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurboECU+ Upgrade Up to 669HP 734TQ Gains: +65 HP +55TQ 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

RENNtech inner fender housings are required

With the proprietary RENNtech ECU+ Tuning the W463 - G550 BiTurbo (up to MY2018) gains up to +102 HP and +128 LB-FT

CLK 63 AMG (W209) Stock Performance:

Rated by RENNtech (peak @crank): 579 HP @ 5

This highly integrated pre-preg carbon fiber spoiler compliments the sophisticated and refined CLS-Coupe exterior design language

Plug and Play with original plugs

RPM Tuned: 608 HP | 561 LB-FT

Continental GTC V8 (MY2019+)

Our intermediate ECU tune increases performance from 550 HP and 544 lb/ft torque up to 638 HP and 695 lb/ft at the crank

RENNtech HHT ECU Upgrade for the 215 - CL 600

Mercedes-AMG S63 E-Performance (W223) 2024+

355 HP @ 5750 RPM