RENNtech | HHT | ECU Upgrade | SLS AMG | C197 | 593HP/495LB-FT | 6.3L V8 N/A | M159 mercedes-benz-amg-gt--192---2023-present--amg-gt-55-esr6223251 Up to 460HP and 464LB-FT

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RENNtech | HHT | ECU Upgrade | SLS AMG | C197 | 593HP/495LB-FT | 6.3L V8 N/A | M159 mercedes-benz-amg-gt--192---2023-present--amg-gt-55-esr6223251 Up to 460HP and 464LB-FTRENNtech HHT ECU Upgrade for 197 SLS AMG. Up to 593HP and 495LB FT. Gains: +30HP & +14LB 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. Programming takes only a

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