RENNtech ECU Hand Held Tuner (HHT) for S 55 AMG | W220 | 370 HP / 410 LB-FT | MY2001-2002 audi-rs5--8t---201t-2015--4-2l-v8-esr9633340 Software updates do not interfere

Software updates do not interfere with the functionality of the EVM

C SPORTCOUPE' (CL 203) 350 V6 [2 Filters Required] (HP: 272 | Year: 05 > 08)

362 hp @ 4

Stock: 503 HP | 461 LB-FT

aerospace grade aluminum hat construction

RENNtech ECU Hand Held Tuner (HHT) for S 55 AMG | W220 | 370 HP / 410 LB-FT | MY2001-2002 audi-rs5--8t---201t-2015--4-2l-v8-esr9633340 Software updates do not interfereRENNtech ECU HHT (HandHeldTuner) for the 220 S 55 AMG. Up to 370HP and 410 LB FT. Gains: +16HP & +19 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.