I came across this when I was looking on CL:

http://sfbay.craigslist.org/eby/pts/1523117573.html


Is this a SLP exhaust, or a stock Z28 exhaust?
Is there any way to tell?

Did SLP make a single in/dual out exhaust for the ss?

 

I think the SLP is 2OTL.

 

That looks like the factory exhaust with aftermarket tips.

 

SLP 2 OTL is exactly that, 2 tips on the left that was on 96-97 SS.
Factory 98 SS exhaust is one 3 1/2'' tip on the left.
Optional in 98 was the dual dual as seen in the pic in the CL add.
The only thing is that, as Johnny6 said, it could be a stock muffler with the SLP tips. But if it were a scam I think that he'd be trying for more money.

 

Looks like Firehawk exhaust with the tips. I still got the tips from mine in the garage.

-Geoff