Air Filters

[Turbo Joe]

Are these performance air filters all what they are boasting themselves to be or is it just better to stick to the standard air filter? Cheers Guys

[yorkie]

Having wasted money on these before without noticeing any difference in performance I would say stick with the std ones.

Although the performance ones are supposed to last longer I have never been convinced that after 50,000 miles they flow any better than a std one would as they still fill up with the same crap.

Even if you changed the std one every 12000 miles you would still pay less over 5 years than for a performance one.

Just my six pence worth

[Parptoot]

I would NEVER fit any of the 'cone filters' to any car. I used to do a lot of the before and after rolling road runs for one of the largest filter companies and only ONCE did I see any gain with one of these fitted, most of them actually lost a few BHP.
They did sound better though, if you like that sort of thing.

[mikeyquattro]

Waste of time and money imo...

[am8631]

standard filter and modify your airbox with a few holes to allow cooler air from the wheel arch area to get in. Best of both worlds - cooler air and a bit of induction noise.

[Turbo Joe]

So much for K&N, HKS etc then?

[spen]

Strong opinions out there. I can only say 500 bhp @6000 rpm and 520 ftlbs @ 3200 rpm using a K&N cone, so they can't all that bad. Had it for two years, no dead MAF so far. Maybe I'd get a few more bhp if I went RS4 airbox? Maybe not.

[mikeyquattro]

Strong opinions out there. I can only say 500 bhp @6000 rpm and 520 ftlbs @ 3200 rpm using a K&N cone, so they can't all that bad. Had it for two years, no dead MAF so far. Maybe I'd get a few more bhp if I went RS4 airbox? Maybe not.

Chubby also has a cone on his 550bhp RS4. And he has a carbon divider to stop the warm air from the engine.

I wonder what Doug has in his S4?

[s4-99]

I've had a K&N cone fitted for over 2.5 years with no probs.....

[S4]

what about this filter... http://www.sdr-research.com/x1/intake.htm

Darren

[spen]

Seems expensive. I made a heat shield from wire gauze and flexible self adhesive aluminised sheet.

[S4]

yes it uses the AEM dryflow, http://search.ebay.com/Audi-S4-A6-Cold- ... wQ20Filter

I have also seen some S4's with a hole in the headlamp! going to the filter.


Darren

[S4]

good pictures of the old airbox mod that has been around a while. http://www.audiforums.com/m_503453/mpage_1/key_/tm.htm

Darren

[s4-99]

Here's mine, i know i could with some kind of heat sheild, but it hasn't caused me any probs so far.....The heat sheild in the link Darren posted up looks good....

[S4]

This place http://stores.ebay.co.uk/Textile-Techno ... idZ2QQtZkm is good, the stuff is top quality.... and a good price.... get a bit of alloy or some mesh, and get a sheet and some roll maybe, have a play....

Darren