RENNtech ECU Hand Held Tuner | HHT | W220 | S55 AMG Kompressor | 528HP/552LB-FT | 5.5L Kompressor | M113 | MY2003-2006 audi-rs4--b7---2006-2008--4-2-v8-fsi-esr4648829 911 - 996 CABRIOLET 3

911 - 996 CABRIOLET 3

development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver reliability

Crank Performance Numbers are calculated with a 14% Drivetrain loss for all rear wheel drive vehicles

CLASS R LONG (W 251) 500 4-matic [2 Filters Required] (HP: 388 | Year: 07 > )

CLASS E SW (S 210) 220 CDI (HP: 125 | Year: 98 > 99)

RENNtech ECU Hand Held Tuner | HHT | W220 | S55 AMG Kompressor | 528HP/552LB-FT | 5.5L Kompressor | M113 | MY2003-2006 audi-rs4--b7---2006-2008--4-2-v8-fsi-esr4648829 911 - 996 CABRIOLET 3RENNtech ECU HHT (HandHeldTuner) for the 220 S55 AMG Kompressor. Up to 528HP and 552LB FT. Gains: +35HP & +35TQ. 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.