RENNtech ECU Hand Held Tuner (HHT) for CLK 55 W208| 352 HP / 390 LB-FT | MY2001-2002 bmw-z4--e89---2009-2016--sdrive35is-3-0-l-i6-twin-turbo--n54b30--esr4254510 650 HP @ 7250rpm /

650 HP @ 7250rpm / 500 LB-FT @ 3000-7000rpm

Made out of T-304 stainless steel (SS) with 2 3/4" tubing

RENNtech published the average stock power during the rpm range set by MBUSA and the peak stock performance

Owner's manual

RENNtech ECU Hand Held Tuner (HHT) for CLK 55 W208| 352 HP / 390 LB-FT | MY2001-2002 bmw-z4--e89---2009-2016--sdrive35is-3-0-l-i6-twin-turbo--n54b30--esr4254510 650 HP @ 7250rpm /RENNtech ECU HHT (HandHeldTuner) for the 208 CLK 55 AMG, up to 352HP, 390LB FT. Gains: +10HP & 14LB 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