These were not really much different than the WS6 cars.
The one to get was the very first Firehawk. They were built on a third gen and they had some major difference or should I say they could be optioned up with some major changes. Bigger wheels and tires were to start. A new intake T Ram and cold air intake. Exhaust and headers. The real treat was the Brembo brakes. These are not the OE Brembo but the F 40 Ferrari Brembo brakes that at the time were state of the art. These cars were special and could even have a roll cage installed. Only a couple were made to full spec if I recall. We did have the show car at work for a while and it was really something special.
As for the later models I would love to find a Comp TA version. They were a Firehawk but with BFG tires and sold in Canada.
The SLP cars also had the ram air hood that nicely incorporated the scoops in the facia verses the WS6 hoods. I always wondered what happened to the exposed headlights. When I saw the original images the cars had a graceful fluid look to them. I thought that those headlights were used only on the early cars and that's why I never see them anywhere. The mystery is solved. As a side note I remember a test among the three most powerful American convertibles in 2002. The Firebird WS6, Camaro SS, and the Mustang Cobra. The GM cars had identical power trains, but the Firebird had a higher top speed than the Camaro due to its better profile.
Its cool, but I'm glad the Firebird went out the right way-with pop up head lights. As an aside, I never felt these 4th gen Firehawks were worth the premium over the WS6 cars. And in some cases they looked a little gaudy (see shiny wheels). The 3rd get Firehawk, on the other hand, is a rare and special beast.