I did not personally dyno the car with the chipwerke, but I could definitely feel a difference with the tune installed. If I had to make a guess, it was probably pushing 370-375, but I also do have an intake and an exhaust, so take that number with a grain of salt. A forum member did a pretty good write up of Chipwerke vs. APR stage 1
HERE
What I can say about the tune is that if you are still under warranty, and don't really want to void it, but are looking for a quick/cost effective way to get a bit more power out of your car, then chipwerke is probably the route you want to go. However, if you are out of warranty, and want to really push the car, and get things such as a pulley, stage 2, intercooler, etc., and have the funds for that, then just go straight to the ECU tune rather than tinkering with a piggyback.
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