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 development and exhaustive testing ensure

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

OPTIMIZED FOR PERFORMANCE Each wheel is pressurized with 10

AMG M177 -engines (2021+) : GLE 63 | GLS 63

911 - 996 CABRIOLET 3

15 sec 127 mph X290 - AMG GT63 R1 & R2 Package w/Launch Control 2

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 development and exhaustive testing ensureRENNtech 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.