Not sure whether CTC still knows what a stock muffler for a Fiero is; they seem to be slowly de-listing Fiero pieces, and if it can't be retrieved from their computer by year/make/model most parts counter staff doesn't know what to do.

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Not the brightest there. I went to see about tires...they told me their computer wasn't showing any that fit.

For an aftermarket muffler, you'll want one with 1 7/8" inlets & outlets. Can't remember the overall length, but you'll have less pain installing it if you can find one where the inlet & outlet as offset from each other.
Anyone know offhand of one that I can walk in and buy, without having to rely on the "knowledgable staff".

Cheers, Derek