To me, there is very little Q/sleeper content...the exterior is hardly unassuming. Even if you remove the wheels, it will still command attention.
The flange exhaust is a cool idea but to me a dead giveaway (should I be driving behind it) that it is far more than it seems...it's just "too" rough, imho.
edit: The above applies to me, driving in the UK. I have no idea what the majority of cars driven on the road in Poland look like.