RENNtech ECU+ Upgrade | R231 | SL 550 | 540HP / 705LB-FT | 4.7L V8 BiTurbo | M278 rpm CLS (C 219) 500 [2

CLS (C 219) 500 [2 Filters Required] (HP: 306 | Year: 04 > 06)

200 cell sport catalytics for improved performance

CL 600 (C215) Stock Performance:

585awtq @ 3

The one-piece carbon fiber Front Splitter is made of 100% pre-preg carbon fiber and developed to complement the full RENNtech AMG GT aerodynamic program

RENNtech ECU+ Upgrade | R231 | SL 550 | 540HP / 705LB-FT | 4.7L V8 BiTurbo | M278 rpm CLS (C 219) 500 [2ECU+ Upgrade 540HP 705LB FT Gains: +66HP +139LB 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