RENNtech ECU+ Upgrade | C218 | CLS 550 | 540HP / 705LB-FT | 4.7L V8 BiTurbo | M278 | MY2012-2014 aston-martin-vantage-v12--my2017---esr8494055 Virtually no lag with impressive

Virtually no lag with impressive throttle response

AMG E63  (MY 2017-21) | W213 | M177 | 4

Carrera GTS Cabriolet

CLA 45 AMG (MY2013+ | C117 | M133 | 2

Audi S3 (8P)

RENNtech ECU+ Upgrade | C218 | CLS 550 | 540HP / 705LB-FT | 4.7L V8 BiTurbo | M278 | MY2012-2014 aston-martin-vantage-v12--my2017---esr8494055 Virtually no lag with impressiveECU+ Upgrade 540HP 705LB FT Gains: +105HP +262LB FT RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal! Our proprietary tuning module stores both the RENNtech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose directly to the ECU. Programming takes only a few minutes and the vehicle can be