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Old 02-17-2014, 11:41 PM   #1
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Coyote Air Filter Replacement

Any thoughts on replacement air filters. I have a 2013 & 2014 GT. I'm talking stock replacement, not a CAI. I've used K&N in past vehicles. Toyota Tacoma, Mazda Speed3, Subaru WRX, 98 Mustang SVT Cobra, to name a few. However I've read conflicting reports on the oil (treatment) in the K&N messing up the sensors in the air inlet ductwork. Anything to this? Should I just use the Ford replacement? Please don't turn this into a discussion on CAI's. Thanks for your input.
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Old 02-17-2014, 11:43 PM   #2
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Can always do what I have been doing on all my cars. Yank the stock filter, hit it really good with compressed air, and pop it right back in.
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Old 02-18-2014, 12:36 AM   #3
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the oil from the reusable filters only mess with the maf sensor if you use to much when you" recharge" the filter. As long you fallow instruction and not use way to much oil when you clean them you will not have a problem.
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Old 02-18-2014, 03:02 AM   #4
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SVTPerformance 2012 GT : K&N Replacement Filter Test - SVTPerformance
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Old 02-18-2014, 05:08 AM   #5
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the oil from the reusable filters only mess with the maf sensor if you use to much when you" recharge" the filter. As long you fallow instruction and not use way to much oil when you clean them you will not have a problem.
I had one (the same filter) on a Harley for over 14 years. It had over 300K miles on the filter. It was cleaned and re-oiled more times than I could recall.

However, the link above indicates what I had heard a year ago. The drop in filters of K&N actually loose HP/TQ. That's not going to go well when the bragging rights start up.
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Old 02-18-2014, 09:24 AM   #6
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They don't lose anything. That test has more holes in it than Gramma's doilies. They just don't do anything and there is the possibility of messing the MAF if you over oil it.

I've done back to back at the dragstrip using K&N and stock with no difference. Take the filter out, big difference...for the worse.
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Old 02-18-2014, 09:49 AM   #7
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Any thoughts on replacement air filters. I have a 2013 & 2014 GT. I'm talking stock replacement, not a CAI. I've used K&N in past vehicles. Toyota Tacoma, Mazda Speed3, Subaru WRX, 98 Mustang SVT Cobra, to name a few. However I've read conflicting reports on the oil (treatment) in the K&N messing up the sensors in the air inlet ductwork. Anything to this? Should I just use the Ford replacement? Please don't turn this into a discussion on CAI's. Thanks for your input.
I have this one in My 5.0. Its supposed to give you 8hp according to their dyno testing that you can see on their site and its only $40 on Amazon.

Dryflow Air Filters - Oil Free Replacement Air Filters and Cone Filters
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Old 02-18-2014, 11:04 AM   #8
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They seem to claim HP only for their full CAI. The replacement filters don't claim this. The claim is probably completely unverifiable in the real world, just like every no-tune CAI claim so far.
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Old 02-18-2014, 11:32 AM   #9
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dont think you'll be getting much from just a filter, i had the filter in my wrangler and never had an issue, wasnt looking for power either though
btw i also had a mazdaspeed3
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Old 02-18-2014, 12:11 PM   #10
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Not only that, but there is the less efficient dirt removal to be concerned with. That difference in the width of the filter pleats as well as the number of pleats has a huge effect on effective surface area. Note that the OEM has more pleats as well.

I see no advantage using a less effective filter like the K&N, especially if you plan to keep your car a long time.
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Old 02-18-2014, 07:29 PM   #11
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Thanks for the responses. The SVTP test & comments were also very informative. I'm thinking I'll put the K&N in my wife's car to slow her down.
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Old 02-18-2014, 07:33 PM   #12
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They seem to claim HP only for their full CAI. The replacement filters don't claim this. The claim is probably completely unverifiable in the real world, just like every no-tune CAI claim so far.
Yep your right I read that dyno chart wrong....But I would rather use AEM since its dry and K&N is oiled
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Old 02-18-2014, 10:35 PM   #13
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If I recall correctly, numerous tests showed that K&N allows more trash through it than a traditional paper filter
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Old 02-19-2014, 04:54 PM   #14
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If I recall correctly, numerous tests showed that K&N allows more trash through it than a traditional paper filter
Yep ive read the same thing and K&N used to advertise a 15hp gain from just a filter and alot of suckers including me bought one, it did nothing. I wont buy anything thats K&N anymore.
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Old 02-19-2014, 06:35 PM   #15
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One thing K&N is really great at is marketing. Even though I know their filters are mostly no good, I still feel compelled for some reason... So far successfully resisting the compulsion, especially after less than stellar results in my own experiences with K&N.
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Old 02-19-2014, 07:06 PM   #16
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One thing K&N is really great at is marketing. Even though I know their filters are mostly no good, I still feel compelled for some reason... So far successfully resisting the compulsion, especially after less than stellar results in my own experiences with K&N.
Yea K&N WAS good at it I guess until someone actually checked and saw what their Air Filters didnt do....They bamboozled people for years and still do I suppose in some ways.
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Old 02-21-2014, 08:45 PM   #17
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I bought aem washable filter ( no oil ). Works great.
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Old 04-26-2014, 11:17 PM   #18
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Yea K&N WAS good at it I guess until someone actually checked and saw what their Air Filters didnt do....They bamboozled people for years and still do I suppose in some ways.
So your K&N air intake system did nothing for your car? I want one that I dont have to tune my car too
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Old 04-30-2014, 10:05 AM   #19
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+1 on the ARM dryflow

---------- Post added at 11:05 AM ---------- Previous post was at 11:05 AM ----------

I meant AEM
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Old 04-30-2014, 11:00 AM   #20
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Yea K&N WAS good at it I guess until someone actually checked and saw what their Air Filters didnt do....They bamboozled people for years and still do I suppose in some ways.
Can anyone provide some real concrete proof or documentation that any of the interweb statements made against K&N hold any truth?

Not just hearsay, or "I read about that too", but actual proof. I've used them (still have one on my 2000 Harley dresser with 300K (two rebuilds at 100K each; third engine is now a 120 CI). Never had any issues with the K&N in the bike, and I have 123K on my 2006 F150; it too has a K&N filter.

While neither gave me any seat of the pants improvement in power, they do filter great; as many have said, don't over oil them; follow simple directions for cleaning and re-oil. They will indeed last a lifetime.
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Old 04-30-2014, 11:04 AM   #21
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Go with K&N. Never any problems for me. If you're worried about re-oiling them too much and causing problems, just buy a new one. Not like their reusable filters are really expensive.
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Old 04-30-2014, 03:51 PM   #22
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On SVT Performance there was some real world testing done on the K&N filter and they lost power. The link is in the 4th post. Regardless it's not worth the $50 over the stock filter.
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Old 04-30-2014, 06:15 PM   #23
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Can anyone provide some real concrete proof or documentation that any of the interweb statements made against K&N hold any truth?

Not just hearsay, or "I read about that too", but actual proof. I've used them (still have one on my 2000 Harley dresser with 300K (two rebuilds at 100K each; third engine is now a 120 CI). Never had any issues with the K&N in the bike, and I have 123K on my 2006 F150; it too has a K&N filter.

While neither gave me any seat of the pants improvement in power, they do filter great; as many have said, don't over oil them; follow simple directions for cleaning and re-oil. They will indeed last a lifetime.
Did you follow the link in post #4 above? Pretty much shows that there's no power gains. The writer in that link also remarks at the greatly reduced surface area of the K&N vs. OEM. Not only will this hold less dirt as he surmises but it will start to flow less, not more, air sooner as this report shows:

Debunking the K&N Myth - Why OEM is Better : Nissan Articles

All of this makes sense. You can't have comparable or better flow with a filter that has less square inches of media unless that media is more open or porous. It therefore cannot filter as small a particles as the less porous filter with greater surface area.
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Old 04-30-2014, 09:39 PM   #24
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I have also put K&N's on everything I own for the last 20 years with no problems.


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Old 04-30-2014, 09:41 PM   #25
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I have also put K&N's on everything I own for the last 20 years with no problems.


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do you have the drop in filter or the system?
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Old 04-30-2014, 09:43 PM   #26
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Look at Aem and AFe for the reusable oil less option.
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Old 04-30-2014, 09:49 PM   #27
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Look at Aem and AFe for the reusable oil less option.

+1

I have the AFE Pro Dry S on my 3.7, their non-oiled filter.
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