Has anyone put underglow lights on a 1984 fiero? i attempted but with the fisher underbody there was no room to hide the lights.
And does anyone have any blue prints for any sub boxes in the passenger side floor board or behind the passenger seat.

There have been a few people on here that have done the underbody neon lights. The one that stands out in my mind is "Skitime"'s GT. He has done a lot of mods to it, and IMHO, it's one of the nicest cars out there. I went and did a search, and he talks about his neon lights here. You might try contacting him if you really want to do this. About the sub box.. The Fiero did come with an optional subwoofer. The box fits perfectly in the passenger footwell. You can get the whole set-up (amp, box, overheard switch) for around $150. There is a guy in the mall selling them for $135. Hope I could help,
-Will

i recommend using the newer LED based underbody lights - much mroe resistant to breakage - especially since the fieor is low

you could do what skitime did and put a metal or plastic strip along the side of the neons... most newer neon kits come with these anyway.

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'86 Fiero GT
My Fiero XoticRydz Mid-Rear Madness

Be Excellent To Each Other" - Bill S. Preston Esquire Ted Theadore Logan