izzynyc

There are so many different tuners and tunes available for this car. Which tune offers the most power and reliability for the platform?

BMS

There is no shortage of options but it really comes down to your specific needs. If you're avoiding flashing due to warranty or lease concerns then consider the JB4 as a flash tune alternative. Solid power gains, you install/remove at home (although it is a bit of a PITA on this platform), and tons of great features.

https://burgertuning.com/collections...mg_c63_e63_jb4

skratch77

Hit up kirklandhans on Instagram. He will take care of you. Runs intercooler pumps all the time and also adjusta main coolant to kick in sooner.