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1Gen-SequoiaGeneral discussion forum for the first generation 2001 to 2007 Toyota Sequoia.
This is a discussion thread titled "Are K&N type airfilters worth it?", within the 1Gen-Sequoia forum, part of the SUV Forums category.
I didn't keep track of any mileage increase, but I did not a definite (if very slight) SOP (seat of pants) increase in throttle responsiveness.
I assume most everyone knows that the easiest mileage improver is to cut off the A/C compressor whenever you can - it's worth 1-2 on the average.
You opened a can of worms with that question. There are two groups on here...those that love them and those that hate them.
I personally run them on all my cars. I too noticed an increase in throttle responsiveness, but at the same time wouldn't say it made it faster, with no increase in MPG. I enjoy it because I can clean it. It made a significant difference in my Land Cruiser and my wifes Solara. It is really car dependent.
The biggest rant you will hear about them is that they clog up the MAF and throttle body. I clean my MAF and throttle body every oil change (7500 miles) while the oil is draining. Takes 10 minutes total, and should be done anyways. I don't notice my MAF or TB being any dirtier than before I got the K&N, but I'm anal, so I do it anyways.
I recommend getting on just for the cost savings.
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Andy Gibson
2000 Tundra, 82K, K&N Drop-in, Spintech Truck/RV Muffler, Hellwig, 2005 Sequoia Center Console Installed and looking awesome!
1999 UZJ100 Land Cruiser, 202K, new carpet, no major Mods planned; it's the wifeys
1987 FJ60 Land Cruiser, 207K, K&N Drop-in, Jacobs Ignition, Jacobs Wires, Dynomax Muffler and Hi-Flow Cat, Electric Fuel Pump Conversion, Someday...A Lift
Yes, you may notice slight more power/torque if it is brand new and properly (meaning lightly!) oiled. If you over oil, it can transfer to the Mass Air Flow (MAF) sensor and cause it to give false readings to the computer which will reduce gas mileage. I also found that the K&N filters quickly loose their efficiency and I ended up cleaning/re-oiling mine about every 5K miles (pain in the a$$). And I'm not convinced that they actually kept the engine any cleaner than using a stock filter.
Headers and catback exhaust can boost your hp and torque but from the data I've seen, do little to help on gas mileage. There isn't much you can do to these engines to increase your mpg except to stay light on the accelerator or trade it in for a Tercel.
You'll get a few more HP and a tiny bit better mpg but you will definitely get more dirt in your engine and possibly be damaging the MAF, etc.
To me it's not worth it. I want my Sequoia to last forever even if I spend a few more pennies on gas and don't win every drag race.
please provide any evidence that it increases power and helps economy. It does neither. In fact, I've got lots of data that shows it hurts power and economy.
+2 haters-crew
The KN filters in my experiences allow much more contanimants into your engine than almost any other filter. You wont find me putting another one in one of my vehicles. Made that mistake once already . Personally after seeing a demonstration of filters I am going to swap out my TRD filter for a True Flow filter .
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2003 Tundra Imperial Jade TRD offroad Performance modifications
2.5 Camburg C/O w/ King 14" 600lb springs, Skidrow Automotive Skidplate
285x75x16 Goodyear Wrangler ATS, 16x8 Ivan Stewart Wheels
4.30 ring and pinion gears, Stock exhaust w/ Magnaflow 18" muffler, TrueFlow filter, Superlift TruSpeed Cosmetic modifications
Debadged, De-decaled and De-labeled sun visors
Pace Edwards Retractable Cover, Toyota Sport Grille
TRD radiator cap, TRD oil cap
RS 3200 Plus Upgrade Modification wishlist
TRD or JBA titanium headers
JBA or possible custom y-pipe
TRD supercharger
IPT valve body mod
Custom Offroad Bumper
Demello offroad sliders
rear disc conversion
Moonroof and power sliding rear window
Where does it ever end
please provide any evidence that it increases power and helps economy. It does neither. In fact, I've got lots of data that shows it hurts power and economy.
Why bother. I've decided against it and recommended against it.
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Sean
'76 FJ55 Land Cruiser SOA Trail Beast
'90 FJ62 Land Cruiser Daily Driver
'05 Sequoia Grocery Getter
please provide any evidence that it increases power and helps economy. It does neither. In fact, I've got lots of data that shows it hurts power and economy.
Show it?
__________________
Andy Gibson
2000 Tundra, 82K, K&N Drop-in, Spintech Truck/RV Muffler, Hellwig, 2005 Sequoia Center Console Installed and looking awesome!
1999 UZJ100 Land Cruiser, 202K, new carpet, no major Mods planned; it's the wifeys
1987 FJ60 Land Cruiser, 207K, K&N Drop-in, Jacobs Ignition, Jacobs Wires, Dynomax Muffler and Hi-Flow Cat, Electric Fuel Pump Conversion, Someday...A Lift
If you wanted better gas mileage, then why did you buy the Sequoia? There is no way you are going to improve the gas mileage of this big hog, but there are some things that you can do to keep it from getting worse. Stick to the basics by keeping the tires properly inflated and rotate/balance them every 5K miles, even if they look like they don't need it. Get the alignment checked every six months and adjusted if needed. Get you car serviced regularly and switch to synthetic oil, if you haven't done so already.
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Are K&N type airfilters worth it?
. Personally after seeing a demonstration of filters I am going to swap out my TRD filter for a True Flow filter 
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