RENNtech ECU Hand Held Tuner | HHT | W204 | C 63 AMG | 517HP/485LB-FT | 6.3L N/A | M156 | MY2008-2015 mercedes-benz-gla-class--156---2014-2020--gla-45-amg-esr2541736 The RENNtech Exhaust Valve Module

The RENNtech Exhaust Valve Module is made in Germany

Rated by Mercedes-Benz:      503 HP @ 5

SL 400 BiTurbo (R231 - M276 Biturbo 4-MATIC Engine) Stock Performance:

900 RPM  |  606 awtq @ 2

RENNtech ECU Hand Held Tuner | HHT | W204 | C 63 AMG | 517HP/485LB-FT | 6.3L N/A | M156 | MY2008-2015 mercedes-benz-gla-class--156---2014-2020--gla-45-amg-esr2541736 The RENNtech Exhaust Valve ModuleRENNtech ECU HHT (HandHeldTuner) for the 204 C 63 AMG. Up to 517HP and 485LB FT LB FT. Gains: +66HP & +52LB 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.