RENNtech Intermediate ECU Upgrade | S212 | E 63 (S) AMG | Wagon | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2014-2016 mercedes-benz-sl-class--231---2017-2021--sl-550-esr8411816 1 x Exhaust Valve Module

RENNtech Intermediate ECU Upgrade | S212 | E 63 (S) AMG | Wagon | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2014-2016 mercedes-benz-sl-class--231---2017-2021--sl-550-esr8411816 1 x Exhaust Valve ModuleIntermediate ECU Upgrade Up to 638HP 695LB FT Gains: +33HP & +49LB FT RENNtech M157 Biturbo ECU Upgrades are TV approved! Our intermediate level 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. This is ideal for customers who want increased performance in their daily driver without worry of extra strain on driveline

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