RENNtech ECU Upgrade | SL 65 AMG | R231 | 735HP/836LB-FT | 6.0L BiTurbo V12 | M279 mclaren-600-lt-esr8962987 ECU+ Upgrade | 523HP /

ECU+ Upgrade | 523HP / 583TQ | Gains: +102 HP / +128 TQ

Up to 320HP and 339 LB-FT LB-FT

992 | GT3 RS

592 wtq @ 4

With the proprietary RENNtech ECU Tuning the C190 AMG GT R gains up to +50 HP and +73 LB-FT

RENNtech ECU Upgrade | SL 65 AMG | R231 | 735HP/836LB-FT | 6.0L BiTurbo V12 | M279 mclaren-600-lt-esr8962987 ECU+ Upgrade | 523HP /RENNtech ECU Upgrade for 231 SL 65 AMG. Up to 735HP and 836LB FT. Gains: +114HP & +100LB 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