RENNtech Intermediate ECU Upgrade | C216 | CL 63 AMG | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2011-14 audi-s8--d5---2019-2020--4-0l-v8-esr9872235 These parts were designed and

These parts were designed and engineered in house by RENNtech and are fully functional components that feature unmistakably unique styling for the AMG GT Black Series

C43 AMG Coupe (C205 | M276 | 3

992 | GT3 RS

Our kit comes complete with high flow performance filter inserts and anodized aluminum MAF sensor retaining clips

Up to 670HP and 840 LB-FT  LB-FT

RENNtech Intermediate ECU Upgrade | C216 | CL 63 AMG | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2011-14 audi-s8--d5---2019-2020--4-0l-v8-esr9872235 These parts were designed andIntermediate ECU Upgrade Up to 638HP 695TQ Gains: +75HP +101TQ 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