Whoah now guys. I'm just talking a single CAI and a conservative pulley (not the 181 or larger). You definitely need a tune if you go further than that. I'm nt talking about intake manifolds, y-pipes, big honking pullies or anything like that. I thought I made that clear, but evidently not.

Now I don't have the datalogs to back this up because I didn't have my dashdaq/zeitronix installed at that point. So I can't prove anything. But according to Rob @ NeedsWings, the additional air you're dumping into the engine with a Code3 or 178 pulley and a single CAI is "well within the tolerances of the stock ECU to adjust and compensate for". Believe me, I picked Rob's brain and Eurocharged before I did any mods. Both told me the same thing: a tune get me more power, but I wouldn't hurt anything not having it.

I raced a whole drag season with just the Code3 and a single NeedsWings CAI - no tune - and I didn't pop any codes or see any evidence of running lean. In fact, judging from my tail pipes and how dirty they got, I would say I was running rich.