Performance Air Filters

[funcat]

I need to change the air filter in my Audi A4 and want to upgrade to K&N,but doing a short research here,I found your link to the test MRO,posted quite a long time ago...http://www.mkiv.com/techarticles/filters_test/2/....so,is it the best choice,or is there already something new on the market?I want a "stock" replacement only,one that will fit in the air box.The K&N was priced at 2570 BHT for a kit,don't know about the Apexi yet...will appreciate some advise,thanks...

[MoonRiverOasis]

There's a ton of different brands of aftermarket filters out there, but the two you've mentioned are the only one's I'd trust (Apexi and K&N) - others may be able to claim better performance, but it's at the expense of filtration ability (i.e. they achieve better flow rates because they filter less contaminants).

The Apexi's are the absolute best IMHO, but they only make complete intakes, not drop-in OEM replacements - well, the last time I looked anyway...

The K&N OEM drop-ins have slightly less flow rate than the Apexi's due to less surface area and a little less free-flowing filter media, but you can trust them to do a great job at keeping the air clean, improve flow rates over the OEM filter element, and you won't have any warranty issues as they're a widely trusted brand.

[funcat]

There's a ton of different brands of aftermarket filters out there, but the two you've mentioned are the only one's I'd trust (Apexi and K&N) - others may be able to claim better performance, but it's at the expense of filtration ability (i.e. they achieve better flow rates because they filter less contaminants).

The Apexi's are the absolute best IMHO, but they only make complete intakes, not drop-in OEM replacements - well, the last time I looked anyway...

The K&N OEM drop-ins have slightly less flow rate than the Apexi's due to less surface area and a little less free-flowing filter media, but you can trust them to do a great job at keeping the air clean, improve flow rates over the OEM filter element, and you won't have any warranty issues as they're a widely trusted brand.

Thanks MRO...like always

[culicine]

There's a ton of different brands of aftermarket filters out there, but the two you've mentioned are the only one's I'd trust (Apexi and K&N) - others may be able to claim better performance, but it's at the expense of filtration ability (i.e. they achieve better flow rates because they filter less contaminants).

The Apexi's are the absolute best IMHO, but they only make complete intakes, not drop-in OEM replacements - well, the last time I looked anyway...

The K&N OEM drop-ins have slightly less flow rate than the Apexi's due to less surface area and a little less free-flowing filter media, but you can trust them to do a great job at keeping the air clean, improve flow rates over the OEM filter element, and you won't have any warranty issues as they're a widely trusted brand.

I've had a K&N in my honda civic for 160K kms now (replaced the stock after the 20K service). No problems whatsoever. It doesn't need a lot of service; much longer than factory service intervals. However I do clean and re-oil mine every 20K kms or so. The pay for themselves in 100K kms or so, compared to the factory air filter. I don't detect any significant increase in performance, but I also modified my airbox by removing the resonator (this was a restriction) to give better air flow.