Aslo, I beleive that the stage2 was offered only on the gs455 as the gsx and gsx stage1 were their own complete package. I've never heard of a gsx stage2 and couldn't confirn that it exists w/google. I've actually seen a gs455 stage2 in a juckyard here years ago. My buddy had a stage1 and we scarfed up everything we could. Grill hood, seats front fenders, heads intake cams. Not a bad haul for $50.
He never got the engine parts mounted, said he couldn't get his headers to fit so he sold them and then about a year later someone stole the body parts off the car while it was sitting in his driveway. He was home and didn't hear a thing.
98 SSEi 111,222 miles.
Intense PCM, LS6 Valve springs, PEMS, FWI. Hawk Street Pads.