Also the K&N oil filter is superior to HD’s despite the recent upgrade. The K&N has a better flow.
Pros: better flow
Reviews of K&N parts For Business
Average Rating
?
The manufacturer's average rating is calculated based on ratings of all its spare parts. It determines the place in the manufacturer ranking
3.9
Manufacturer Ranking
#90
429
Spare Parts
6
Country
USA
Website
knluftfilter.com
Spare Parts
Comparisons
Put a K&N cleanable air filter in long ago I’m now at around 80k mileage and most likely going to sell my 2016 wrx before 100k.
Pros: cleanable air filter
Vehicle:
Subaru
Mileage: 80000 km
K&N HP1002 because it has a hex on the end that makes taking it off through the wheel well really easy. Don't even have to jack up the car, just remove the rear splash guard.
Pros: easy to remove, hex end
Part number: HP1002
I actually switched back from a short ram to the stock airbox recently and it completely changed how the car drives — smoother powerband, better MPG, and way better throttle response. I do miss the VTEC sound a little, but performance > noise for me.
Pros: smoother powerband, better MPG
Cons: miss the VTEC sound
Vehicle:
Honda Civic
Mileage: 140000 km
Air filter change gets K&N.
K&N also makes a washable cabin air filter, although it’s a b@$&; to clean.
Pros: washable air filter
Cons: difficult to clean
I don’t recommend reusable performance filters since they can alter air flow enough that you end up running a little lean with a turbo charged engine. This is why a lot of turbo charged engines can’t just have a cold air intake slapped on without a tune. This actually occurred with my 08’ Subaru Legacy GT. Stick to a quality standard filter that offers optimal air flow and filtering capability.
Pros: optimal air flow
Cons: alter air flow, run lean
Vehicle:
Subaru Legacy
Not worth it at all. It’ll allow more dirt in your engine for zero power gain.
Pros: zero power gain
Cons: allow more dirt
KN avoid them they allow to much dirt to pass through, if you want higher quality go AFE Dry Pro.
Pros: higher quality AFE Dry Pro
Cons: allow too much dirt
Reusable K&N filters very marginally improve performance at the cost of allowing more dust and other particles into your engine. OEM paper filters or other reputable ones like WIX do a much better job of actually cleaning the air.
Pros: marginally improve performance
Cons: allowing more dust
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