RENNtech ECU Upgrade | C218 | CLS 550 | 480HP / 605LB-FT | 4.7L V8 BiTurbo | M278 | MY2015-2018 audi-a8--d3---2002-2009--4-2-l-v8-fsi-esr7551102 Our intermediate ECU tune increases

Our intermediate ECU tune increases performance from 429 HP and 538 lb/ft torque up to 480 HP and 605 lb/ft at the crank

538 HP @ 5900 RPM

3 Series CABRIOLET (E93) M3 V8 (FOR USA MARKET ONLY) (HP: 420 | Year: 08 > 09)

997 GT3 RS 3

it will not return

RENNtech ECU Upgrade | C218 | CLS 550 | 480HP / 605LB-FT | 4.7L V8 BiTurbo | M278 | MY2015-2018 audi-a8--d3---2002-2009--4-2-l-v8-fsi-esr7551102 Our intermediate ECU tune increasesECU Upgrade 480HP 605LB FT Gains: +45HP 162Lb 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