RENNtech Intermediate ECU Upgrade | X166 | GL63 AMG | SUV | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2013-15

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RENNtech Intermediate ECU Upgrade | X166 | GL63 AMG | SUV | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2013-15Intermediate ECU Upgrade Up to 638HP 695LB FT Gains: +64HP & +72LB FT RENNtech M157 Biturbo ECU+ Upgrades are TV approved! Our proprietary ECU+ upgrade for the Mercedes M157 Biturbo 4 MATIC engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability. Our intermediate level ECU upgrade offers huge gains in performance across the entire RPM range without sacrificing around town

Our proprietary ECU upgrade for the Mercedes M133 engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability

390 lb-ft @ 1

SL 500 (R230) Stock Performance:

Available in Black and White

We have found the M176 engine stock performance numbers vary from the baseline figures claimed by Mercedes Benz

The pre-preg material is cut and hand laid into a mold to the proper thickness and cured in an autoclave at strictly controlled

Audi S3 (8P)

Rated by Mercedes-Benz: 577 HP @ 5

67 sec 116

With the proprietary RENNtech ECU Plus Upgrade the C292 - GLE 43 AMG Coupe gains up to +41 HP and +60 LB-FT

Audi A8 TFSI (D5)

Rated by Mercedes-Benz: 577 HP @ 6

Exchange/Return Notes