Why Not K&N?

[tricktom1]

Why doesn't anyone use K&N ?

[dalton1]

it dosn't filter well and allows dirt into the engine and "dusts" the turbo. shortening it life.

[ianstew]

yep, engine/turbo dusting, poor filtration in dirty/dusty conditions

[tricktom1]

Really, I've ran them on my turbo charged street/race bike for years with no problems. It's a good rumor for the competition to spread though, is there any evidence or proof from testing?
Thanks,

[dalton1]

My boss had a k&n on his truck since new and I took the intake off with 70k miles on it and the compressor wheel in the turbo is trashed. I have a napa filter on my truck and mine looks fine with 263k miles. both trucks are 99 7.3L

[Barry Smith]

I took my OEM filter off after 5000 miles and put a K&N on it. After 55000 miles I took the K&N filter out and it wasn't as dirty as the OEM after 5000 miles. I didn't change the climates I drove in so that tells me it wasn't catching any dirt. No more K&N for me!

[tricktom1]

Thanks for the replies

[CCSracer13]

Originally Posted by tricktom1

Really, I've ran them on my street/race bike for years with no problems. It's a good rumor for the competition to spread though, is there any evidence or proof from testing?
Thanks,

Tricktom1, I used to run them for years on my racebikes as well. (unitl I switched to BCM filters.) Anyways, based on some of the reading that I have done on the diesel sites, here is some additional detail. From what I gather, the K&N only has a couple of layers, or plys of the cotton gauze. The brands that everybody likes (S&B, AFE) have like 8 layers of the gauze. I can't verify any of this, it is just what I read in some of the other posts.

BTW, are you close to Dallas?

[tricktom1]

Thanks, South East of Houston

[CT Performance, Inc.]

Motor cycles are not turbo diesels...all washable filters IMO shouldn't be used..
I'd either use a stock filter or a dry aftermarket one.