I am going to set my car up for a fast road and the occasional track day. What would you guys recommend for handling mods? I was thinking H&R springs, Bilstein shockers, front and rear anti roll bars, some poly bushes and a proper 4 wheel alignment. Is there anything else I should get or should avoid getting?
I'd add these based on my experiences:
S3 intercooler or better and consider a hpfp to ensure AFR remains good.
WALK kit will deal with the most problematic bush. OE refresh is good enough for everything else and check drop links.
Downpipe with pre-cat delete to assist in keeping heat down at turbo. Stainless systems shed heat quickly.
Bilstein B12 suspension kit works well on track.
Getting good -'ve camber might involve adjustable top plates (ground control make some) or similar and it may be worth doing this ahead of alloy lower arms. -2.35 to -2.85 degrees works well.
Pay for an intake de-coke and whip the sump off to check the oil pick up pipe for gunk...cheap enough to just change.
Full set of engine mounts - these engines move around a lot under high loads.