GreyBush

iTrader: (3)

http://minneapolis.craigslist.org/ra...680044419.html Read that. I was wondering if since he had that for his 91 S5 would it work for my 87 s4?

clokker

iTrader: (2)

No.
Different AFMs between series, the S4 has a flat flange the filter would need to bolt to.

GreyBush

iTrader: (3)

I figured as much. Thank you!

3vil

iTrader: (4)

while clokker is mostly correct, he didn't mention that there are adapter plates that bolt onto the front of s4 afm's to allow a cone style filter to be used. now the next thing to point out is that you'll jut be sucking in warm air vs. the factory cold air intake.

Evil Aviator

Also, the one for sale is missing the attachment for the air pump hose, and the filter element is no longer fit for service.