So as some of you guys have figured out, I bought an 05' GTP that ended up having a few things done to it by the previous owner, bad things:
The pulley was a 3.4"
The exhaust had the piping from the Cat to the Y and mufflers replaced
The airbox had been taken apart and I found lots of "extra" bolts and a 10mm socket (like I don't already have too many of those) and the ECM was loose in there.
There is some wiring modifications behind the panel on the left side of the dash (haven't figured out what it is for yet)
Now I noticed in looking at other pics of MAF's that there is supposed to be a piece of honeycomb air straightener in the MAF. Mine is missing, how detrimental is this? is it really needed? I added an intake and a K&N cone filter right at the end of the MAF.
Jeff