What's up vortex! So I left the dub game, flipped my STI (literally, not like resold it for more money) and now I'm coming back

lmfao, so anyway.. I'm gonna get into something practical for work while I save up for another Subi, and figured a wagon would be pretty legit. I used to have a 04 GLi with typical mods.. best car I ever owned. So I want to pretty much replicate the slight mods I did, into a Passat. Relating to exhaust, I want a 3" downpipe, to either a 2.5" or 3" catback, doesn't really matter to me.. catless on the downpipe, of course. I can't seem to really find anything though.. what do you guys recommend?! mk4 parts were sooooo easy to come across haha this is like a whole new world to me!
Also, with a front mount, best brand? I'm having trouble finding setups and stuff! I'd love buying used stuff to save some cash, so if anyone knows of anything let me know!!
Pretty much, mainly right now I'm just focused on
Exhaust (no clue here..)
Coilovers (prob gonna go with FK streets cuz that's what I had on my Jetta, great bang for your buck)
FMIC (no clue)
Turbo Inlet Pipe (forge? had it on my Jetta as well..)
in that order

help me out! Thank you.

cheers