Salut,
fiero_blues and I got to talk about the V6 Fiero intake and its restrictive flow.
Here is the thread I told you about from Pennock's:
Improving Stock Intake PlenumOne of the pictures posted there of the modified upper plenum:

And a few more from the PFF search:
Porting the Fiero intakeThe REAL skinny about the Fiero intakeNo one has come up with a flow/dyno proof that these mods are worth the work/cost
YET! But I'm sure it can't hurt the air flow.
The
www.trueleo.com intake have got some proven results, but that's if you're willing to live with the looks of it.

There is a lot more info on PFF if you feel like searching and reading LOL
(Please feel free to make any comments in French, I'll get the translation in the next meet

)