RENNtech ECU Hand Held Tuner | HHT | S 63 AMG | W221 | 534HP/485 LB-FT | 6.3L N/A | M156 | MY2008-2010 audi-rs4--8k---2012-2015--4-2l-v8-fsi-esr2470407 Derived from RENNtech Motorsports’ AMG

Derived from RENNtech Motorsports’ AMG GT4 racecar

High-Gloss finish

Carrera 4 GTS

Jaguar F-Pace SVR (X761) 2018+

Range Rover (L405/LG) 2013 – 2021

RENNtech ECU Hand Held Tuner | HHT | S 63 AMG | W221 | 534HP/485 LB-FT | 6.3L N/A | M156 | MY2008-2010 audi-rs4--8k---2012-2015--4-2l-v8-fsi-esr2470407 Derived from RENNtech Motorsports’ AMGRENNtech ECU HHT (HandHeldTuner) for the 221 S 63 AMG. Up to 534HP and 485LB FT LB FT. Gains: +16HP & +20 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.