RENNtech ECU Upgrade | C218 | CLS63 AMG | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2012-13 mercedes-benz-glc-class-coupe--253---2016-present--glc-63-amg-esr1091906 RENNtech Performance Front Rotors |

RENNtech Performance Front Rotors | E63 (W/S 213) | SLS AMG (C197) | SL55/63 (R230) | GLC 63 (X/C253) | C63 Black Series (C 204)

507 HP @ 6800 RPM

443 LB-FT @2

Up to 392HP and 432LB-FT

Rated by RENNtech:               605 HP @ 5

RENNtech ECU Upgrade | C218 | CLS63 AMG | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2012-13 mercedes-benz-glc-class-coupe--253---2016-present--glc-63-amg-esr1091906 RENNtech Performance Front Rotors |ECU Upgrade Up to 638HP 695TQ Gains: +88HP +151TQ RENNtech M157 Biturbo ECU Upgrades are TV approved! Our intermediate level ECU upgrade for the Mercedes M157 engine still offers huge gains in performance across the entire RPM range, but with a slightly reduced peak HP and torque from our standard tune. This is ideal for customers who want increased performance in their daily driver without worry of extra strain on driveline components or for areas