RENNtech ECU Hand Held Tuner | HHT | R230 | SL55 AMG Kompressor | 528HP/552LB-FT | 5.5L Kompressor | M113 | MY2003-2008 porsche-cayenne--92a---2011-2018--gts-esr8899844 With the proprietary RENNtech ECU

With the proprietary RENNtech ECU Tuning the W222 - S63 AMG 4MATIC+ gains up to +87 HP and +44 LB-FT

Rated by Mercedes-Benz:      577 HP @ 5

TCU Upgrade: TCU upgrade elivers faster acceleration by matching the power output of our ECU and Turbo upgrades with increased Clutch Torque Limits

Rated by Mercedes-Benz:      515 HP @ 6

RENNtech Stainless Steel Sport Mufflers with Valves for the C217 - S 550 Coupe BiTurbo

RENNtech ECU Hand Held Tuner | HHT | R230 | SL55 AMG Kompressor | 528HP/552LB-FT | 5.5L Kompressor | M113 | MY2003-2008 porsche-cayenne--92a---2011-2018--gts-esr8899844 With the proprietary RENNtech ECURENNtech ECU HHT (HandHeldTuner) for the 230 SL55 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.