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 it will not return

it will not return

countless hours of in-house Research & Development

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

Used together

The SLR McLaren Performance Exhaust consists of RENNtech Stainless Steel Sport Mufflers

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 it will not returnECU 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