RENNtech ECU Hand Held Tuner | HHT | CLS 63 AMG | C219 | 534HP/485LB-FT| 6.3L N/A | M156 | MY2007-2011 mercedes-benz-cls-class--219---2006-2011--cls-63-amg-esr3294546 Rated by RENNtech: 563 HP

Rated by RENNtech:               563 HP @ 5

Sizes: S - 4XL

they also act like a cheese grater on the brake pads which wear them at an accelerated rate and create grooves in the pads which in turn creates grooves in the rotors

With the RENNtech ECU Plus Upgrade the W213 - E43 AMG Sedan gains up to +14 HP and +57 LB-FT

694 LB-FT @ 3

RENNtech ECU Hand Held Tuner | HHT | CLS 63 AMG | C219 | 534HP/485LB-FT| 6.3L N/A | M156 | MY2007-2011 mercedes-benz-cls-class--219---2006-2011--cls-63-amg-esr3294546 Rated by RENNtech: 563 HPRENNtech ECU HHT (HandHeldTuner) for the 219 CLS 63 AMG. Up to 534HP and 485LB FT LB FT. Gains: +27HP & +20LB 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.