I had my A3 dynoed a few days after exaust fitment. The result was underwhelming. It was dynoed at 205 back when i had it remapped, long before any exaust. (Maxeffect = Hp, Maxmoment = Torque)
Disappointed, i went to the shop that did the remap, and he offered me a free dyno test to see what was up. Well it came out quite different.
His explanation was that first of all, the dyno itself the other shop is using, is considered outdated, and that the blower or whatever its called (The cooler they put in front of the car), was too small. The one he himself was using, was actually massive. Atleast 3 times as big.
Its not thats its really that important, because the car is really fast now, but those 2 results are quite different, and i have no idea what to belive.
The car is an A3 1.8T AUM 150hp model with a remap, turboback milltek, GFB recirc valve and a pipercross panel filter. Nothing else has been done to it.