Stage 2 on said STi runs a 13.1 "Stage 2" on B5 S4's is the common term for being chipped (GIAC, APR, etc) and having downpipes/catback. I have no idea what they mean by S2 on the STi, however I can tell you first hand that race we witnessed was lost via bad driving. I've got several friends all with B5 S4's, two of them Stage 3 (K04 swap, chipped, exhaust, etc) all of them deep into the 12's even with the "Stage 2" configuration. Another one of my friends has an STi that put down 390whp and they routinely destroy him.