RENNtech ECU Hand Held Tuner | HHT | S 63 AMG | W221 | 534HP/485 LB-FT | 6.3L N/A | M156 | MY2008-2010 audi-rs7--4g---2013-2017--4-0l-v8-tfsi-esr8517887 SLK (R 171) 300 [2

SLK (R 171) 300 [2 Filters Required] (HP: 231 | Year: 09 > 11)

PREORDER NOW LIMITED TIME OFFER - SAVE 10% ON PRE-ORDER OF RTS WHEELS RENNtech TRACK SERIES The RENNtech Track Series is a fully forged wheel derived from RENNtech’s extensive motorsports background and engineering expertise

SL (R230) 300 [2 Filters Required] (HP: 231 | Year: 09 >)

079) [Needs 2 Filters] (HP: 612 | Year: 05 >)62 (W240) 5

RPM or driving mode

RENNtech ECU Hand Held Tuner | HHT | S 63 AMG | W221 | 534HP/485 LB-FT | 6.3L N/A | M156 | MY2008-2010 audi-rs7--4g---2013-2017--4-0l-v8-tfsi-esr8517887 SLK (R 171) 300 [2RENNtech ECU HHT (HandHeldTuner) for the 221 S 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.