Dang. I thought about doing the turbo but that will be later on. I wanna stick with the cheaper stuff right now. and with the exhausts ive seen at being like $4k I think im gonna have to try and find a way around buying an exhaust. Your exhaust sounds really nice in the video by the way.

x-pipe it man...magnaflow 2.25" thats the first mod we do...

so you like the magnaflow better than flow master

for Xpipe yes........thats what the forum says before i did the upgrade.......but if Flow Master is growlier than magnaflow..then by all means..go with that if youre going for more meaner tone then go with that and let us hear it man....

I don't know which would actually sound better. every car is different. I had flow master 44s on my dodge pickup but it was a 5.9L with no cats. So I cant really compare the 2.

you have the option S522A, which is Level 5 option, so all the below options are prewired in your car:
Level 2
S235 - trailer hitch
S502 - SRA (whatever it is)
S508 - PDC
S609 - Nav
S624 through S629 - telephone/radio

Level 3
S248 - steering wheel heater
S261 - rear airbags (interesting, I wonder if this is retrofittable)
S265 - RDC, tire pressure
S461 - backrest heating system in the rear
S496 - seat heating system in the rear
S533 - rear air conditioner
S536 - auxialliary heating system

Level 4
S220 - single axle level control

Level 5
S522 - xenon lights

U cnt...the best is just do it..lol.....
some people are not happy with xpipe and need more tone...(like me)...so i had to do more..lol

This crazy how you find this stuff. Awesome. So what would I have to do in order to actually have the heated seats? I guess I have everything else except the steering wheel heater and the trailer hitch. But they don't really matter.

trailer hitch - ONLY BMW original, nothing else!!! with dealer's labor - about $1000.

steering wheel - it was done, you need the wheel, a special contact ring, and i think a fuse to complete the link...

for the seats, you will need the seat and the back (from a wrecked one) or figure how to stick the aftermarket heating pads into your seats...
you will need the 61316988957, the switch, about $70 from a dealer, you need two...

i am checking to see if you need a relay or whatnot...

to see if you are really prewired, you might want to yank the rear seat up (it is pressure fitted, no screws, no bolts)... just place your hand on the edge of the seat, approx "between" the legs of the rear right passenger, and yank it hard up... then, place your hand on the edge of the cushion "between" the legs of the left passenger, and do the same thing... the middle seatbelt does not come off (needs to be unscrewed, no need now), so you would need to pull it and feed through the hole opening of the seat as you move the seat away from the base - the seat will not be completely out but you can stick you hands around to see if there are any wires/connectors that are hurled away, taped or hidden... if you find them, your chances of successfull retrofit are increasing... lol....

I think I may be in luck. I just checked and there is all kinds of wires underneath the back seat.