Lets talk about engine only.. s63TU
I always thought M cars are well known for its impressive engines.
It's been almost about a year since its debut but I don't see many 3rd party tunes available for this f10 m5... Specially compared to M157 AMG engine. (Yes.. There are some.. But it seems to me there needs many modification to turbos.. Etc.)
It feels to me the engines are already at its max capacity.
What do you guys think?