S2000 Modifications and Parts Discussions about aftermarket products and parts including reviews, information and opinion.
Sponsored by:
Sponsored by:

K&N or not

Old 01-17-2019, 09:44 AM
Registered User
Thread Starter
Join Date: Nov 2018
Location: Durham
Posts: 7
Liked 0 Times in 0 Posts
Default K&N or not

Hi folks:

I am a new owner of a 2003 AP1, 48,000 miles. I have a very limited history on the car, but as far as I can tell it is completely stock except for a K&N filer and intake. This is a daily driver, street car only. I am not one to clean my own filter, so it will need to be replaced at some point (not really sure how often). My question is should I keep the K&N or replace the filter and intake back to stock. I'm also missing the black filter housing. I think I would like the car to be "stock", but I may not fully understand the advantage of the K&N, so any advice either way is welcomed. Thank you in advance.
Larry_T is offline  
Old 01-17-2019, 10:19 AM
Join Date: Nov 2007
Location: Illnoise. WAY downtown, jerky.
Posts: 4,406
Likes: 0
Liked 128 Times in 117 Posts

The K&N is ugly.

BUT probably makes a small amount of power.

Some people like the noise. B serious doesn't.

I prefer the stock box for looks and function.
B serious is offline  
The following users liked this post: B serious
Larry_T (01-17-2019)
Old 01-17-2019, 10:33 AM
Community Organizer
Fokker's Avatar
Join Date: Mar 2013
Location: Tucson, AZ
Posts: 2,983
Liked 20 Times in 20 Posts

I would suggest learning to love cleaning it. A replacement filter for the FIPK intake is over $100. The care kit is ~$10 and will let you clean and re-oil the filter multiple times (easily lasts all year). If you return to the stock box (not counting the cost of that), a replacement filter will cost $20-30 each time you replace.

As for power, not much at the top end. Gains are in the mid-range.
Fokker is offline  
The following users liked this post: Fokker
Larry_T (01-17-2019)
Old 01-17-2019, 10:37 AM
noodels's Avatar
Join Date: Nov 2013
Location: Mars
Posts: 3,442
Liked 57 Times in 56 Posts

Water & washing powder in a bucket works well,
noodels is offline  
The following users liked this post: noodels
Larry_T (01-17-2019)
Old 01-17-2019, 10:46 AM
Registered User
Join Date: Jan 2019
Location: Calgary
Posts: 5
Likes: 0
Liked 3 Times in 3 Posts

I have owned k&n on many cars and trucks over the years whether it be a drop in or a full intake and they really are not hard to clean. YouTube is a great resource and should build your confidence to clean. I found the only annoyance was waiting for it to dry. Otherwise advertise a swap for the stocks parts, likely someone near you looking to upgrade from stock.
Les13 is offline  
The following users liked this post: Les13
Larry_T (01-17-2019)
Old 01-17-2019, 12:01 PM
Registered User
Join Date: Jun 2016
Location: Vancouver, WA
Posts: 182
Liked 24 Times in 24 Posts

I'd personally keep the intake. I love intake sound on all cars!
LagunaPearlAP2 is offline  
The following users liked this post: LagunaPearlAP2
Larry_T (01-17-2019)
Old 01-17-2019, 12:30 PM
The King's Avatar
Join Date: Oct 2012
Posts: 173
Likes: 0
Liked 12 Times in 10 Posts

I had a K&N in the stock box few several years. I had a tendency to over oil it. I was concerned about getting excess oil going into the throttle body, so I gave it to a buddy. He eventually went back to a stock filter also. I've read that these filters may breathe a bit better, but are not as effective filtering dirt as an OEM filter.
The King is online now  
The following users liked this post: The King
Larry_T (01-17-2019)
Old 01-17-2019, 01:10 PM
Chuck S's Avatar
Join Date: Jul 2014
Location: Chesterfield VA
Posts: 7,065
Liked 245 Times in 234 Posts

Buy and use the cleaning kit. Don't over-oil it. I bought and retain it for the induction noise. More "performance," at least in the sound area.

-- Chuck
Chuck S is offline  
The following users liked this post: Chuck S
Larry_T (01-17-2019)
Old 01-17-2019, 05:02 PM
Registered User
MrFunk's Avatar
Join Date: Nov 2016
Posts: 689
Liked 40 Times in 40 Posts

I've had the K&N intake.
Pros - sound. Maybe a slight slight increase in throttle response. Maybe a slight slight increase in power. Neither are really all the noticeable. It is very very easy to clean the filter. Just buy the kit on amazon. Remove the filter (anyone who knows how to use a screw driver can do it), Spray the filter with the cleaner. Use a hose and spray the filter from inside out to get all the dirt out. Let it sit in the sun and dry for a few hours, spray with the oil then re-install. Then you're good for a year.

Cons - heat soak: in the summer the engine bay gets hot. Or if you are sitting in stop and go traffic the engine bay gets hot. Or if you are sitting at a light and engine bay gets hot (you get the idea)... then you go to accelerate or pull away from the light, the engine gulps in a big inhale of heat saturated air and bogs down. I swear I lost power more often than I gained. The stock intake does a great job of only drawing in air from the outside. So - if you don't mind doing it, I'd suggest going back to stock. You can also use a K&N filter in the stock box (which is what I did initially).
MrFunk is offline  
The following users liked this post: MrFunk
Larry_T (01-17-2019)
Old 01-17-2019, 05:47 PM
darcyw's Avatar
Join Date: Aug 2010
Location: um, a house
Posts: 3,248
Likes: 0
Liked 68 Times in 62 Posts

I have done rolling studies on the FIPK vs. OEM intake. Consistently, at speed, the FIPK runs 10 degrees cooler than the OEM in nearly all temperatures tested (2006 DBW s2000). In addition, when waiting in the hot summer heat in the autocross lane, the IAT with FIPK gets hot...but within just a few seconds of setting off, the IAT drops significantly. Does this translate to more power? Certainly more BWAAAAAA!

just before I set off at the start line or stop light, I blip the throttle several times, but in the summer heat, the computer will pull timing and you'll bog down regardless. Even worse with the A/C on. Run highest octane fuel you can (94 here in Canada) to help improve resistance to detonation.

darcyw is offline  
The following users liked this post: darcyw
Larry_T (01-17-2019)

Quick Reply: K&N or not

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands