A4/S4 aftermarket parts ex-changeability

[ikotua]

Even though I got my A4 in september, I am planing to get an S4, probably as soon as a facelift comes out (if my bank account permits that is) and I was wondering what aftermarket products will I be able to just take of the A4 and put on the S4.
Rims? I am planing to get 19x8.5 ET 35 with 255/35/19
Springs? Next car will be with ADS so i dont see of getting coilovers.
ICE – probably won't do anything aftermarket with current stock as Ill get B&O
Intercooler? – will for example AWE/EC intercooler be interchangeable with S4
exhaust – Other than mufflers, i think not
HFI?
Any other engine aftermarket parts that can be interchanged? BTW i've got a 1.8T FWD.

Thanks!

[jriddle11]

Most parts are not because your current A4 is a 4 cyl versus a SC V6. Here are my best answers to your questions.
- Rims - Yes
- Springs - No 4cyl versus SC V6 (weight difference)
- ICE, why not just get the OEM hook up since its a better option?
- Engine, exhaust, etc. parts I don't think will fit because you will be going from a 4 cyl to a SC V6