it would take a bit of work as the 90 spec has a wider front air intake unlike teh 88

the 88 has like a step under the number plate bit where this valance slides inas the 90 spec is all flush

plus i wouldnt ruin a 90 spec bumper with that skirt tbh

buts thats just my opinion, i prefer the valances on the 88 cars like my old cabby in the garage in my profile