I have survived the "flaming".....puhhhh...
I came from 300hp (original) to a littel over 500hp
(NOT WHP)
I love the extra power, and the kit for 2 years and 24'000 km
500hp are also in my view the maximum without much intervention
(but that's enough for me and had no problems so far)
Installing the kit necessarily by a professional, with a custom setting
This important suggestion I can give you
Greetings