i think powerjunky is right

No that looks like the 3.9L from the 06-07 G6 GT or the 06-07 Impalas. Just look at the intake.

Yeah thats a 3.8

what engine are you running in there? looked like a 3.8 but i'm not so sure.

ATTENTION! there was a mix up during the video upload so the info is missing from proper entry location. The popping noise in the video is the result of a camera problem. The video is made up of 4 different clips and towards the end you can hear the improvement in the engine tuning as well as note the difference in the exhaust note as a result of the glass pack installation.

I'm not happy with the way they sound and will change them out for something that restores a more refined version of the hot rod exhaust note you hear during the first 3 qtrs of the video.

There were a few mechanical problems present after the tune was refined a good bit that prevented a test drive and I ran out of time before I could make the needed corrections. The build thread can be found at:

http://www.fiero.nl/forum/Forum2/HTML/084972.html