Whats the best way to find out my actual power gains on my audi s3 which i bought just over a year ago. I asume i have to take car to a specialists etc, is this costly?. And where do i start looking. Live not far outside glasgow.
I have been told car has
REVO remap, taking it to 265 bhp
And it also has a BMC carbon filter and a forge recirculating alloy dump valve.
Any help is well appreciated