I need the front lower plastic piece(ground effect) mine is cracked pritty bad. im repainting the car and need it soon.its a 84z28 and would appreciate any help i could get in lokating one. GM does not make them anymore i guess. here is a pic of the lower piece.

 

try hawks or third gen resorce, maybe even year one

 

Holy cow that's one big air cleaner

 

neither one has the exact piece that looks like the one i have.

 

Front Lip Spolier

there it is just the worng picture, the 82-84 z28 were all that style, 85-90 were the solid, 91-92 were the ones with the brake ducts

give him a call to verify though