RENNtech ECU Upgrade | C216 | CL 550 | 500HP / 625 LB-FT | 4.7L V8 BiTurbo | M278 | MY2011-2014 mercedes-benz-c-class--205-sedan---2015-2022--c-350e-plug-in-hybrid-esr8664468 C400 (Airmatic Optional)

C400 (Airmatic Optional)

The RENNtech upgraded M273now produces up to 402 HP and 405 LB-FT at crank

The system improves power delivery

Options: Valve Stems Upgrade Lug Bolts Titanium Included TPMS Upgrade Center Caps Design V1 | Design V2 Tires Mounted and Balanced  Available: Track or Street spec

RENNtech ECU Upgrade | C216 | CL 550 | 500HP / 625 LB-FT | 4.7L V8 BiTurbo | M278 | MY2011-2014 mercedes-benz-c-class--205-sedan---2015-2022--c-350e-plug-in-hybrid-esr8664468 C400 (Airmatic Optional)ECU Upgrade 500HP 625LB FT Gains: +52HP +87LB FT Our intermediate level ECU upgrade for the Mercedes M278 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 and countries with extreme altitudes, temperatures or