The craigslist ad does not state their brand or part number. The Pacesetter number you posted is for headers with A.I.R. fittings. The headers in the picture has no fittings. Your '98 car will need headers with fittings.
The ad also states he bought them for his Silverado and that fit 2000-2006 Camaros. This guy doesn't know what he's talking about.
I'd also say these are ebay headers. I'd pass on these.
__________________ -MEDIUM BLUE METALIC 1999 Trans Am A4, 600+ HP build going on now!
ZR1 9's & 11's, SSBC 13" 4 piston friction, PCMforless tuned, Magnaflo stainless cat-back.
-71 Monte Carlo SS454 496 CID, 600HP
Last edited by Paul Bell; 07-25-2012 at 08:30 AM..