All 2020 models require bench flashing at this time.
[ POWER FIGURES REFLECT ECU TUNE PLUS DOWNPIPE ]
The Weistec M274 ECU upgrade for the 2015+ C300 provides gains across the entire powerband resulting a vehicle that is more fun to drive in all driving situations. The M274 ECU upgrade can be paired with our M274 Downpipes for further improved response and engine feedback.
- Increased HP and Torque
- Improved Throttle Response
- Optimized Fuel and Spark
*Power gains vary based on model, modifications, fuel, and running conditions.