K & N air filters

[np]

I`ve just put a K & N panel filter on my 406 HDI.All my local factors did`nt do 1 for the 406,or list 1.ECP`s did 1 for the Xantia,but not the 406.
After looking at
knfilters.com
the Xantia filter is the same as the 406 Hdi filter.K & N part 33-2539.Order`d a Xantia filter from ECP`s,£41 with the VAT,fits a treat.On the ECP reciept,its printed as a Xantia/406 filter,so i dont know why they dont list it.
So if you want a filter for your 406,try the Xantia filter,or look on the website.

[AtitudeJim]

the same part nr works for the C5 Hdi 110... and its quite a good mod...

[duncan bladen]

did they make any difference , i put one in my xsara h/back , purely cos thy last so long

[np]

Not sure if its made a difference but after an extra 120k miles since fitting it i have more than saved money by washing the k&n.

[John Plum]

They make a difference in this way:
Paper filters' flow decreases as they get dirty, Oil filters don't. Therefore, between filter replacement or cleaning schedules, engine power-fuel efficiency down in the case of paper filters.
It's not very long before paper filters' flow is impeded, although it varies according to air quality. I would say, certainly within a thousand miles, usually earlier.


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[Fake Concern]

I didn't get on with a K&N filter. After about 2000k I got "engine management faulty" message. I took the filter out & put a new paper one in. The K&N one had loads of flies stuck to it almost as if they were attracted to the oil! BTW the message went out again after new filter fitted.

[John Plum]

Interesting, so flies are getting in, but you don't see them in a paper filter.


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[Northern_Mike]

I think the flies become undone in the tight folds of a paper filter and turn to dust quicker. The issues I've come across with K&Ns on a couple of cars in the past - Imprezas being one, Saab 900s being another, is that people over-oil the filter, the oil gets sucked in and gets in the MAF sensor, and buggers it up. My V6 needs a new air filter, I may treat it to a K&N if I keep it.

[Fake Concern]

I hadn't over oiled the K&N filter as it was pre oiled from new. It is strange about the flies though.