K&N or Amsoil Air Filter?

[LBTRS]

Ordering a new air filter for my new truck (should take delivery next week) and was wondering which is a better filter, K&N or Amsoil? Was leaning towards the Amsoil as it sounds like it fits tighter in the stock airbox. Where is a good place to get a Amsoil filter if that's the recommended one? Any recommendations? Thanks for all the great info on this site.

 

[EMDDIESEL]

With $3. 00 in foam 1/8" tape on the air box lid edge, the K&N will fit fine with no Leaks.

 

[LBTRS]

Amsoil half the price

EMDDIESEL,



Unless I looked it up wrong the Amsoil appears to be about two thirds the price of the K&N. Hate to pay more for the K&N and then have the jerry-rig it to get it to work like the Amsoil. Where am I going wrong?



Thanks,

 

[Sky]

Go with the K&N RE-0880. Ijm very impressed thus far with it! $50. 00 at summitracing.com I think its well worth the money.

 

[EMDDIESEL]

The stock style K&N i have seen for about $55. 00 and the Amsoil for about $40. 00. You cant go wrong with either one if you are going to keep the stock airbox.

 

[Sky]

Ray I have a stock box K&N that I just replaced with the RE-0880. I used it for about 20k miles and its still in great shape if you want it for $25. 00 its yours. Email me if your interested. All you need is the grease for around the edges to seal it. Heck I think I got some of that too, I can give you.

 

[Extreme1]

Why are you changing the air filter on a new (stock?) truck?

It won't help performance any. If you want to hear the turbo better, pull out the silencer ring. If flow IS a problem, remove the snorkle to the fender. If it is STILL a problem, ditch the stock box.



Did I miss something?

 

[Sky]

Re: Why are you changing the air filter on a new (stock?) truck?

Originally posted by Extreme1

It won't help performance any. If you want to hear the turbo better, pull out the silencer ring. If flow IS a problem, remove the snorkle to the fender. If it is STILL a problem, ditch the stock box.



Did I miss something?

Sure it will. I noticed right away the difference. All you have to do is run the K&N for a bit then stop and put the stock filter in and you will notice right away. It feels like the truck is starving for air. Turbo whine Is almost gone with the stock filter, and alot louder with the K&N. That tells me there is alot more air running in.

 

[Devildog]

I'm not to impressed with my new K&N filter, I'm running about 32lb of boost and sounds like she starving for air, I checked the air filter gauge and it was at 75-80%, Maybe the factory has too much oil on it, I'm going to clean it and re-oil it ( lightly) and see if that helps. Good luck with yours.



Extreme 1, you were correct, It wasn't the K&N air filter it was the duct, I drilled 6 1-1/4" holes in the duct where it passes through the fender, Problem solved!

 

[Extreme1]

Devildog - Try removing the duct between the airbox and the inner fender before you clean the filter. This seems to be the intake restriction. It was mine. Post your results.



Sky - On a stock truck - no difference. It does sound better, of course. If an air filter substitution made a power (which would also equate to fuel efficiency) improvement that could be felt, let alone measured, the truck would already have a bigger element.



On a BOMBer like yours, you probably need the increased flow to match your increased fueling. Did you remove your fender duct yet? Try it. Mine would still pull the minder down 1/2 way with the new filter. Removing the duct fixed it. Got a bit more turbo noise too. Had to put the silencer ring back in.

 

[ray1933]

K & N filter

I run the K & N and to insure I had plenty of air I took a 1 inch bit and drilled holes in the intake side of the air box ( Bottom) till it looked like swiss cheese.



I have never been able to see any signs of a dust leak or anything getting around the filter seal. It has been in the truck for about 85,000 and I have cleaned it once and it did not really

need it then.

 

[rob10858]

what i like about the kn is the ability to clean, oil , and use it for the life of the truck, yes the life of the truck. when we buy new trucks, we immediately remove the stock filter and replace it with a kn. when we sell them they have the same filter that we paid $50 bucks for with no problems. if i had a stock filter or any other type of filter with the foam liner, id change it every 5000 miles or less. these things just clog up and restrict the air like you would not believe. the idea is a good one as far as the prefilter goes, but in reality, it clogs faster, restricts air faster, and sometimes seperates and really causes air flow problems. if im missing something here, maybe someone can set me straight. the sound from the kn vs stock filter tells me that the engine is breathing better. ive never had an engine related failure due to the kn, and trust that if they didnt filtrate enough, we would have found out after 15 years.

 

[Sky]

Well Ill still disagree with extreme1, a K&N does make a difference in a stock box hands down. Al least it has for me in my last 3 Cummins trucks. Now I went to the RE-0880 and it make even more of a difference.

 

[EMDDIESEL]

There is a difference on a stock truck, without question. You just did not realise it. You need to pull a big hill with a stock paper filter, then the K&N and you will be able to tell by looking at how much faster you make it up the hill.

 

[ray1933]

Air Filters

Hey Sky

What is the 0880 filter you are useing ??

 

[John Berger]

Amsoil

That's my choice. I've heard complaints on this website that the K&N flows less air and more dirt than the Amsoil. My silicon readings have always been low with the Amsoil filter. That's my choice. There are quite a lot of K&N users that are happy with their choice, too.

 

[Sky]

Re: Air Filters

Originally posted by Ray

Hey Sky

What is the 0880 filter you are useing ??

The RE-O880 filter is a K&N. The prefilter I use over top is the K&N 25-0880. You can get them at www.summitracing.com

 

[DNelson]

I removed my K&N after I found oil from the filter was being pulled into the turbo inlet! Went to a Fleetguard filter, with no perceptible loss in power.

 

[Sky]

Originally posted by DNelson

I removed my K&N after I found oil from the filter was being pulled into the turbo inlet! Went to a Fleetguard filter, with no perceptible loss in power.

Your filter was over oiled, just wash it and re oil lightly.

 

[EMDDIESEL]

Ditto Sky, 99% of the oil problems are over oiled filters. More oil does NOT mean better filtration.