With the stock air box, can I use a K&N filter? I've heard that the oil that they use on them can cause problems with the AFM on some cars. Just wondering if anyone knows for sure about this.
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you can use a K&N filter in the stock box, or you can take the box off the amf and use an adapter for a cone filter. both will work fine.sigpic
1987 - 325i Convertible Delphin Auto [SOLD], 325i Convertible Delphin Manual [SOLD]
1989 - 325i Convertible Bronzit m30b35 swapped [SCRAPPED], 325i Sedan Alpine Auto[DD]
1991 - 325i Coupe Laguna Manual [Project], 535i Sedan Alpine [SCRAPPED] -
I have a cone filter on it now, but I've heard that they don't really help much sitting there sucking in hot air. So I'm thinking either re-install the stock box, or create a heat shield for the cone filter. Correct?Comment
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pretty muchOriginally posted by coreyw View Post-Paolo
1986 325e RIP.
1989 525i
1986 635CSI
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you can't hurt the AFM with oil. you're thinking of hotwire MAF sensors.
if you already have a cone filter, do the heat shield.Comment
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