I'm shocked! Just passed my CA emissions!!!
I'm running a Haibeck/Henderson/Sorresso chip, ported with a 4:10 rear end.
Just put the stock manifolds and cats back on.
Not sure if it helped but I put in a bottle of "CRC Guaranteed to Pass" additive and a fresh tank of gas and ran her down the highway about 10 miles. There's a lot of good feedback on this stuff on the net. Particularly on the ThirdGen (Camaro/Firebird) forum. Based on what I have read it's especially good on knocking down NOx. But then again I have relatively new O2 sensors, injectors and plugs. Not to mention the 4:10 rearend.
Here's the report.