It's not about Airtrek but more in general. My Airtrek comes with clear windows (local USF car), but I've tinted the rear doors, rear side panel and rear windscreen 75% tint. Using it for 4 years now, no problems...
after changing to the td04hl-15G... i've been getting this problem :(
my boost will fluctuate from +-0.1bar from full boost so it feels like the car jerking.
i only have a few suspects of my own.
1. fishbone... but...