ZZP tunes are fine. Anyone that tells you different has probably never seen how similar they are to WBS, DHP, 3800performance, Intense, Overkill, etc...
Stock tune should be fine with a plog/dp and 3.5 as far as fuel goes. They tend to run somewhat rich already.
But knowing if the car has KR is something you'll want to know about. A tune will just help with a few small aspects as of right now because those mods arent very serious. I'd suggest not buying a ZZP tune and going with a different vendor or a custom tune.
Hi im just looking for good routes to go as far as gaining more power. This is going to be for a DD so nothing to crazy. Right now all thats done is a zzp downpipe and plog with a 3.5 pulley...