Quote Originally Posted by SlowNA06 View Post
Tune for pure stock right now, re-tune after important mods. Install freshly tuned pcm's with pulley drops. That being said, installing a 3.4 tune on a 3.8 pulley will probably skull**** your engine.

ZZP's quality of tune has been suspect in the past, but there are some, like VictorSmalls, that are thrilled with theirs.

I love mine. Had problems with other brands in the past, but boxed tunes are hit or miss.

Originally ran a basic bolt on N/A tune from ZZP for years and was very happy with it. Now running a turbo tune and could not be happier.