I have fitted one of these Race Diagnostic Liquid Golf gauges
http://racediagnostics.com/cms/index.php?page=liquidgolf-options and have usually been quite accurate. Had it on the car when I only had a FMIC and it was getting to about 156 bhp. When I put K03s the max I got was 170, but usual driving was 165. I have know put on the de-cat and Miltek R32 exhaust and the other day I got a whopping 193 bhp from it
So to recap:-
Standard car 150 bhp
+ a FMIC 156 bhp
+ K03s 170 bhp
+ de-cat & Exhaust 193 bhp
Now I Know there will be a little inconsistent with this but all the time I think the gauge has been not to fare away from the truth looking at a lot of other post from people.
The car has not been mapped in any way.
I do find it hard to believe that a standard 150 golf without a map can get to this figger without a map and if I was to read some else do this I'm not shore if I would believe them, but this it true.
I had to take a photo of it to make shore I sore it right.
I have done a few other runs as I thort it might be a once off but have had two more attempts where I have got it to 190 and 192.
Here is a photo of the figger from my car I got the other day. This is in my car and no one eles.