All you have is a chip and exhaust and you are expecting 40hp more than stock?
Stock those things are MAYBE 125-130 at the crank, brand new with 0 miles. Its now 16 years old.
If all you really have is the chip and the exhaust, thats pretty close to being right.

If you had 160-180 at the wheels in your A2, take it from me, you will be able to boil the tires 1st, 2nd, and half way through 3rd....