RENNtech ECU Upgrade for CL 550 | C216 | 402 HP / 405 LB-FT | MY2007-2010 porsche-cayenne--92a---2011-2018--turbo-s-esr3230433 0 Supercharged V8 (AJ133) -engine:

0 Supercharged V8 (AJ133) -engine:

AMG GT 55 & 63 MY 2023+ (C192 -chassis)

Note: We have found the new M279 engine stock performance numbers vary from the baseline figures claimed by Mercedes Benz

The RENNtech ECU Plus Upgrade brings the C 43 AMG Sedan up to 416 HP and 460 LB-FT | Gains: +41 HP and +62 LB-FT

Left and Right Caliper Duct

RENNtech ECU Upgrade for CL 550 | C216 | 402 HP / 405 LB-FT | MY2007-2010 porsche-cayenne--92a---2011-2018--turbo-s-esr3230433 0 Supercharged V8 (AJ133) -engine:RENNtech ECU Upgrade for 216 CL 550. Up to 402HP and 405 LB FT. Gains: +20HP & 14 LB 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