[MikeOD]

You don't need a ported TB at all...bone stock my car dyno'd 367 RWHP. With Kooks headers and a dynomax catback and a tune...and several different cold air intakes until I found one that worked well and didn't BLATANTLY say "look at me, I'm an aftermarket air box", I dyno'd 425 RWHP on the same dyno...that's a 58 HP gain.

For what it's worth, I went with the Haltech...went through 2 Vararams (they both wrinkled near the MAF sensor, and the turbulence on the MAF sensor (seen in datalogs) was just out of control)...there's a LOT of choices for intakes with the filter behind the drivers side headlight...I thought Haltech looked simplest...and works great...MAF sensor airflow is smooth as glass with this intake too...which makes for a much better/easier tune.

Long tube headers and a tune alone can be good for a solid 30 HP...