Cosworth's are not disposable, they can be washed and re-used.

I understand the literal difference between the two filters. I was wondering more along the lines about those dyno's people have posted with the K&N's.. Could it be assumed that the Cosworth's are going to net the same results?

There's no way to tell without actual flow data.

Damn flow data

I just got off the phone with Cosworth. Their filters seem to be stepchildren. Noone there knew a lot about them, and readily admitted that they made them "because some people can't afford Cosworth engines, and want a Cosworth part in their car, so we created a filter--everyone needs filters--to help start these people out with our products."

No flow-data aside the 10%+ was given. No dyno data was given. Filtration was stated as better than OEM paper. Service life was described to me as equal to or shorter than OEM, so stick to the OEM replacement schedule. Technically they claim it can be washed with soap and water as it is synthetic, but I don't really think it's the BEST course of action (personal opinion). Of course, I also would rather buy a new K&N than clean it, because of the over-oiling/risk of damaging the media.

Does anyone have any heads-up tests vs. K&N in an environment that shows either superior filtration or flow? (dyno, etc.)

K&N claims that they enhance flow by 20% or so, based on their panel-filter flow data. Cosworth claims 50% of that. Beyond that...I'm in the dark.

I always buy a new filter anyways. F*ck if I am going to waste my time cleaning and re-oiling or washing or whatever. :icon17:

Prior to this thread I was set on K&N, then I said oh cool, Cosworth, and now it's like...:confused:no clue

i don't have the time to find the dynos, but check over on the Evo X forums. testing on and off the dyno show this filter to be superior to the K&N. Jon Drenas at COBB socal puts his stamp of approval on it. i wouldn't have chosen it for either car if it was an inferior product.

I actually looked at the Evo stuff and it makes me feel good about Cosworth, it's just difficult since all the info we have here is K&N users

Fwiw, here's Cosworth vs. HKS on an Evo...

http://i725.photobucket.com/albums/w...opinfilter.jpg

I take it Cosworth doesnt make a filter that would fit on my Gen 3's do they??

i haven't seen one. aFe might though...

K&N--because I'll sell you a set. :tiphat:

Oiled cotton or synthetic dry works best, with slightly better flow on the oiled cotton at the cost of some filtration (slightly better for the dry). Both should flow and filter better than paper, so no worries.

Foam filters suck. The HKS is a foam filter.

I too just sell off the old for someone else to clean and purchase new ones. Less of a hassle.

based on my UOA's, which also measure particles that indicate poor air filtration, my K&N's work well.