Inexpensive, decent air filters for a turbo

[PercentSevenC]

So, I'm gearing up to dive into my turbo project, and would like some recommendations for what to do for an air cleaner. I'm trying to keep it in the $25-35 range without ending up with total garbage.

I've been thinking something like this:
http://cgi.ebay.com/ebaymotors/ws/eB...n%3D2%26ps%3D5

Or this:
http://cgi.ebay.com/ebaymotors/Spect...Q5fAccessories

Thoughts? Advice? Flames?

[Phoenix7]

Don't go TOO cheap but make sure it will last a while.

The reusable ones are cool. I was reading that the shape and size of the filter help with how the air enters the manifold (for better low-end and top end) but I don't know if this mostly applies to carbed cars.

I'm rocking a reusable one on the NA and a crappy Cotton one on the TII (which needs to go ASAP).

[P71]

There's a reason every single vessel in the US Coast Guard uses a real K&N on their engines...

Real K&N all the way. They're marginally more expensive then those el cheapo ones, have a lifetime warranty, and provide the best filtration.

[PercentSevenC]

K&N isn't really an option for me. They're twice as expensive as the stuff I'm looking at. Same with Apexi (which, from all accounts, is a better filter than K&N). I might upgrade eventually, but for now I just need something to keep sand and rocks out while I put the extra money toward a wideband.

[P71]

Don't say I didn't warn you when a chunk of foam comes off and destroys your turbo. I've been in the turbo field a long time and have seen it happen multiple times. Air filter first, wideband second.

[PercentSevenC]

Those ones aren't foam. They're multi-layer cotton-gauze, same as K&N. I appreciate the concern, though.

[Whizbang]

more importantly....what size is the turbo inlet? if you start talking T4 territory look into the air filters for diesels.

[PercentSevenC]

It's a stock S5 turbo, so 2 3/8" OD. I figured I'd get one with a 3" opening and reduce it to 2.5" just before it enters the turbo.