An APR stage 3 car that doesn’t have motor mounts, trans mounts, downpipes…I’m surprised. Did you buy it like that? Usually all of that stuff is done all at once. What clutch are you running?
I think I may remember messing around with a Santorin B5 S4 on central at some point last year but (no offence) it seemed much slower then my car when they should be identical. You sure it’s K04/Stage 3?