HHT ECU Upgrade

The RENNtech HHT ECU Upgrade is a performance tuning solution specifically designed for the 197 - SLS AMG model. This system delivers significant gains in horsepower and torque across the entire power band by optimizing ignition timing, throttle mapping, air/fuel ratios, and the engine's rev limiter. The upgrade culminates in a peak output of up to 593 HP and 495 LB-FT, a notable increase from the stock 563 HP and 479 LB-FT. Utilizing the RENNtech HHT (Hand Held Tuner) module, users can effortlessly switch between the RENNtech tuned file and the vehicle's original stock file. The module connects directly to the OBD2 port, allowing for programming in a matter of minutes. This feature provides the flexibility to reflash the vehicle's ECU as many times as desired, ensuring adaptability for various conditions or preferences. With extensive experience in ECU tuning dating back to the mid-1980s, RENNtech ensures that their proprietary ECU upgrade not only delivers impressive performance enhancements but also maintains rock-solid daily driver reliability.