Only some ST205's came with extra parts. They were known as the WRC model released in 94 limited to only 2500 worldwide with Japan getting 2100 from the total. I own one myself and the extras included were Anti-Lag piping, basic water injection as well as a front spray bar HOWEVER these bits need a bit of modification to actually work. What you were told about drilling a hole into the manifold is only a small step to actually activating the Anti-lag... Not to mention the large inventory of CT20's needed
Ways to tell your car is a WRC:
-Bronze antilag piping that can be seen from the heat shield
-A different heat shield with a bulge at the top section of it
-3 Spray nozzles that can be seen by the crash bar
-Hood spoiler
-Black GT-Four spoiler blocks