No you were definitely right on on that S9 STH "Stealth" thing... The one with the vent on the front that was big enough to eat up small children as you drive down the road...
I still have no idea what that was, so thanks for posting up the name, will google it now.
Edit just Googled the B6 Stealth... Chevy V8, WTF!!
Specification
Engine V8, 6276cc, 16v Max power 511bhp @ 6500rpm Max torque 479lb ft @ 5000rpm
Weight 920kg Power to weight (with driver) 564bhp/ton (501)
0-60mph 3.9secs
Max speed 180mph+
Price £90,000