RENNtech ECU Upgrade | W212 | E63 AMG | Sedan | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2012-13 maserati-quattroporte--156---2013-present--s---3-0l-twinturbo-v6--esr7930835 With the proprietary RENNtech ECU

With the proprietary RENNtech ECU Plus Upgrade the R172 - SLC 43 AMG gains up to +41 HP and +62 LB-FT

With the proprietary RENNtech ECU Plus Upgrade the X253 - GLC 43 AMG SUV gains up to +41 HP and +62 LB-FT

and reliability

CL 600 (C215) Stock Performance:

Maserati Ghibli S (Q4) (M157) 2013 - 2017

RENNtech ECU Upgrade | W212 | E63 AMG | Sedan | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2012-13 maserati-quattroporte--156---2013-present--s---3-0l-twinturbo-v6--esr7930835 With the proprietary RENNtech ECUECU 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