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Discussion Starter #1
I posted this in the Sequoia forum but it should apply here as well since they are the same parts and I believe the K&N filters will fit my 2010 Sequoia (even though K&N told me they don't... *shrug*).

K&N has three different intakes for the 2008 Tundra/Sequoia:

http://www.knfilters.com/search/product.aspx?Prod=77-9031-1KP
Part 77-9031-1KP
HP gain: 13.43 @ 5142 rpm

http://www.knfilters.com/search/product.aspx?Prod=63-9031-1
Part 63-9031-1
HP gain: 13.05 @ 5282

http://www.knfilters.com/search/product.aspx?Prod=63-9032
Part 63-9032 (actually, not sure if this will fit my 2010)
HP gain: 8.08 @ 4717 rpm

Does anyone know why there is such a difference in HP gains? I believe it's the air filter (different sizes) but I'm not sure.

I’ve also read that TRD’s intake gains 8 HP @ 5600 rpm. Compared to the K&N numbers, I would believe the K&N is “better” for performance gains. With such a heavy vehicle I’d like to get as much HP as possible.

Any comments on this?

Any please, try not to post "You're wasting your money" or anything similar. I'm just trying to learn what the differences are, if any, with the K&N filters.

Thanks.

.
 

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First one has polished aluminum tube. 2nd one has black plastic tube. 3rd one is for the 4.7 V8 :)

Oh yeah, forgot to ask if you tow? If you do, the K&N is loud as sh*t underload.
 

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Discussion Starter #3
You don't say. Okay, thanks. Didn't think the intake tube would be the difference.
 

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Discussion Starter #4
No, no towing at this time.

Is the K&N louder than the TRD?
 

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Not of fan of KnN's oiled filter design..... Or any other oiled design. I don't like my TRD Filter due to it needing to be oiled... Get the Volant.. :D
 

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No, no towing at this time.

Is the K&N louder than the TRD?
Yes. The K&N is an open element design. The TRD is enclosed box design. The K&N system is much louder. If you search the forums, there are a few guys who have ditched the K&N and went back to stock or to an enclosed design to rid of the noise while towing or under load.
 

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The M.F.I.C.
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I've been looking around too.... just to let you know, there are lots of complaints about using oiled filters (like K&N's) with our trucks... apparently the oil clogs the MAF sensor, causing computer errors and such. Looks like you're better off with a paper filter, as it cleans better, and doesn't clog up the MAF. I've narrowed my choices down to either the Volant, or the TRD Intake. Folks seem to like the sound, performance, and especially the looks of the Volant.

Just my 2-cents - good luck!
 

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Oiled filters and MAFS are usually a no-go... Chevy will not honor your engine warranty if you use one. I know this is a Toyota, but I would stick with what Toyota says is OK. I like quiet so no aftermarket louder intake or exhaust for me. I used to have to shut my diesels off when going through a drive-thru, I kind of enjoy being in a quiet truck.

Just my .02 - I won't say you are wasting your money, because 13hp is nothing to sneeze at.
 

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Pick one with a filter that is non-oiled and closed element. K&N was one of the first to market and they still sell on name but in substance they aren't competitive anymore. There's better out there. I can go to atozone and Home Depot and get the parts to replicate a K&N setup for less than half what they sell for new.
 

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Or you could leave the stock CAI in place and replace the stock filter with an aFE ProDry S permanant filter. Very tough, probably weighs 5 lbs, is washable with soapy water and will last for years. You'll also get maybe 1.5 HP and 1 to 1.5 MPG improvements. And rip out the stock charcoal thing just above the filter. Definitely my best mod. Check it out... AFE Pro-Dry S Air Filters
 

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Or you could leave the stock CAI in place and replace the stock filter with an aFE ProDry S permanant filter. Very tough, probably weighs 5 lbs, is washable with soapy water and will last for years. You'll also get maybe 1.5 HP and 1 to 1.5 MPG improvements. And rip out the stock charcoal thing just above the filter. Definitely my best mod. Check it out... AFE Pro-Dry S Air Filters
I actually ordered one like 2 days ago.. ;) Replacing the TRD SC's intake..
 

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You'll be loving it soon. And I can't give you any more pts Gutz. Sorry man.
 

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Discussion Starter #13
Thanks everyone for the info.
 

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The oil used in oiled filters DOES NOT harm the MAF. There has been much mis - information on this. There have been several studies on this by independnet labs - do a search. The easiest to find are the studies done by a lab at the request of K&N. It is on the K&N web site.
 

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The oil problem is dependent on the person who oiled/cleaned the filter. Most people seem to think more is better and over do it. When properly done, it doesn't effect anything and does what it's supposed to do. And Gutz, let us know how that goes!
 

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Hmmm.. K&N paid an "independant" lab to test their product... I wonder if k&n stepped up to the plate and helped out all those folks whose warranties were denied. Don't get me wrong, in years past I always ran a k&n filter and I properly re0oiled it when required. I won;t run one anymore, because as aprevious poster noted you can get a better filter, but you can't pay a higher price.
 

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Discussion Starter #17
Does anyone know how/why the K&N is 13hp gain and the TRD is 8hp gain? Yes, we have a heavy vehicle so 5hp is probably nothing on the grand scheme but that's a decent difference to ask the question.
 

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I have had K&N for years on my old car. I think what kick started the craze was that on some vehicles, converted to a CAI setup and having a filter with double the surface area yielded measurable results. If you are using he same size filter as OEM, or if your engine won't benefit from the added airflow, it is a waste. Period. It does not filter as well as paper. Looking at the size of the tundra filter, I doubt there is much to gain.
Air Filtration Test
 

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Does anyone know how/why the K&N is 13hp gain and the TRD is 8hp gain? Yes, we have a heavy vehicle so 5hp is probably nothing on the grand scheme but that's a decent difference to ask the question.
Marketing. I highly doubt K&N got an actual 13HP increase to the wheels. That a lot for just an intake. Maybe 2-5 HP...maybe none at all.
 

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The oil used in oiled filters DOES NOT harm the MAF. There has been much mis - information on this. There have been several studies on this by independnet labs - do a search. The easiest to find are the studies done by a lab at the request of K&N. It is on the K&N web site.

Understood... but there's filters out there on the market now that do not introduce so much human-error-related malfunction into the maintenance process. Why bother trying to get just enough but not too much oil on a K&N when I can buy something that can be cleaned with soap and water which will stop dirt and oil from entering my engine just with the filter design itself rather than by being saturated with oil.
 
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