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CLASS S (W 221) 450 4-matic [2 Filters Required] (HP: 340 | Year: 06 > )
Our easy to ready
C400 (Airmatic Optional)
Rated by RENNtech: 435 HP @ 4
The cartridge supporting shaft is both larger and stronger designed to handle the larger wheel and additional power
RENNtech ECU Hand Held Tuner | HHT | CL 63 AMG | C216 | 534HP/485 LB-FT | 6.3L N/A | M156 | MY2008-2010 audi-s8--d5---2019-2020--4-0l-v8-esr9872235 CLASS S (W 221) 450RENNtech ECU HHT (HandHeldTuner) for the 216 CL 63 AMG. Up to 534HP and 485LB FT LB FT. Gains: +16HP & +20 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.