Hello,
I searched but found nothing, did Chevy ever offer an SLP packaged Iroc, I was searching craigs today and found one. I never heard of such an optioned Iroc.
http://losangeles.craigslist.org/lac/car/582470719.html

 

I suspect that it was not an actual option package on the car rather he got a package from the dealership and had it installed.

 

I'm pretty sure this was the case. I have an old GMPP catalog I got around 1989 or thereabouts and SPL stuff (individual pieces and the package) was available from GM.

 

Yup, the SLP stuff was available I beleive starting in 1989 OTC from your local Friendly Dealerships.

John

 

Confirmed. My 92 GTA has this package.

The year that it is be sure it has the Tri-Y headers and NOT the 4-into-1 headers, that way you know if it's real or pieced together at a later time. Mine was installed by the original selling dealership and finanaced in with the sale of the car, I have all the original paperwork prooving it in storage. By the time I had bought the car all the parts had been removed by another dealership after it was traded in before it was resold. It took me like 3-4 years to find all of the 100% EXACT specific parts with the correct GMPP part numbers before I had all the parts to reinstall it. I actually bought the last LB9/4L60 SLP chip left in GM dealer inventory in the entire country, and that was in 2001!