Shaq32

If any of the members have a K&N engine air filter in a Lexus is250 could you please tell me if you notice any difference vs a stock OEM air filter ? im not to worried about the horse power but the few MPG increase that K&N claims to give. THANKS!

DixieLex

my old Tacoma and wife's Sienna. No issues with MAF or throwing codes. That said, I see no measurable difference in OEM and K&N as far as performance.
Perhaps hammering the accelerator might show a difference, but in real-world driving...nada.

I have no plans on using one of my IS. This engine has enough issues with CBU and fuel dilution to even think about letting more contaminants into the intake.

Bottom line, save your $$$$

Tketrns

I have an 06 is350 and i couldn't wait to put on the K&N CAI Taiphoon kit. The sound is amazing. At 2k rpm when the torque just comes on is where the mild noise is most pleasant. I never get tired of hearing it. At 3-4k on the rpm the noise is noticeable but not deafening, and then at WOT its like a angry bear with a muzzle on. Soo Angry sounding. The MPG gain over stock is about 1-2 mpg, based on in the in car computer. and then on the highway it may be even more, I've never taken a road trip in the 350 but all the mpg estimates based on the in car computer are higher by about 10 percent or more. YMMV, and the noise is the best part any mpg gain will be a bonus.

Brian7

iTrader: (2)

A filter is a filter, I doubt you'd notice anything. Many people put K&N filters in with too much oil on them and the oil coats the MAF and throws MAF codes. I personally think oiling an air filter is a cop out for a poor filter design since almost all cars come from the factory with dry paper filters. If you don't need to oil a filter, why go through the trouble? I threw a K&N intake on my 2001 Tacoma but bought an AFE Pro Dry cone filter to replace the oiled K&N filter and I've had zero issues with the MAF.

RussZTT

I average 26mpg with my 250 and get about 400 miles out of a tank. I'm pretty happy with that and don't feel the need to spend extra on a K&N.

5nX37

Was in the same situation last week looking to replace my dirty filter. But opted into sticking with OEM. The 1-2 HP supposed gain on my 06 IS350 doesn't quite justify the extra cost for me. Also, the oil from the K&N filter has caused MAF issues on my old car before. Never had desire to look into oiled filters ever since. And if you're after a deep throaty intake sound, look into modifying the airbox by cutting out an opening to achieve the sound, a la Fsport CAI. Haven't gone this route cause I fig'd the cutout opening would suck in warm air from the engine, kinda counterproductive compared to OEM IMO.

Aspect

I've read that the MPG savings are bs. That unless your filter wasn't ever changed and clogged up with so much garbage and leaves that it was choking your engine that you shouldn't see a difference.

JM1995

iTrader: (3)

Not really worth it. I guess being able to wash and re use is okay in the long run. I have it and you can't really notice any gains or mpg increase lol. Get yourself a joe z intake tube instead and if you want to be cheap (sorry) lol cut the hole in your airbox for sound or you can just buy the f sport airbox on ebay. A new one costs around 80??

My current set up is Joe z exhaust and intake with the f sport lower airbox with the K&N air filter.