I've always used K&N oil filters but read some good things about the green filters. Here is the web site:

http://www.greenfilterusa.com/

Looking at it up close it seems to be of better material than the K&N's are. I like the way the pleats go the same direction as the OEM ones do, it gives it more structual rigidity. You can see what happened to my K&N's pleats after I cleaned it a few times. I went easy on it but some of them still ended up kinking. I'm not sure it will effect how well it works but it sure looks bad. The cotton weave in the Green Filter looks tighter too as does the screen mesh holding it on VS the K&N. Anyway, here are some shots of the filters. The Green Filter comes pre-oiled. But before installing it you will need to remove the small nibs on the corners. These nibs are to locate the filter in the center depending on the application. I measured the OEM filter and saw that the nibs on were not needed. The install is pretty simple. Undo the two clips holding the airbox shut, the other end has tabs that fit in slots. Take the old filter out and put the new one in. I like to keep the old filter in the box the new filter came in. When it comes time to clean the filter, I like to let it dry a day or two before re-oiling in. So while it's drying I put the OEM filter back in.

Something I like to do when putting this type of filter in is remove the whole airbox. Then I can put the new filter in and be sure it's seated properly and hasn't slipped letting dirty air get by the element. The chances of that happening are slim but I feel better checking. With the airbox out, you can look on the dirty side in the intake hole and see it's in properly.

I got my Green Filter for a good price from Lisa Wilkins you can call and order at: 800 584-8727


Peaty 8/20/03

OEM VS GF

Green / OEM / K&N

Close up

K&N Close up

Cut the nibs with a razor of some nippers

install it in the airbox

Like the K&N the green filter has it's own cleaning kit. I got the kit from Lisa the same time I got the filter. The kit was around 10 bucks. Green Filter says to clean the filter every 6 months or 6K miles. The kit looks similar to the K&N one too the oil is green though and not red :)

The recharge kit, you can get one at Summit Racing:

http://tinyurl.com/ysnl5s

I've got almost 6 months of time on the filter and felt like giving it a clean. I was curious to see how dirty it was since I've been going down some dirt roads lately that were very dusty. When I removed the filter it wasn't as dirty as I thought it would be (~10K miles) but I felt like cleaning it anyway. I did take a white tissue and wipe the inside of the clean half of the airbox and it was still very clean. The Green Filter seems to be doing a good job of it.

I followed the directions on the cleaning kit plus after oiling I put the filter overnight on some shop towels to get any excess oil off so as not to screw up the MAF. I'm happy to report that the Green Filter holds up better to cleaning than the K&N filters I've used in the past. You can see from the pics that a freshly re-oiled filter looks the same as a new one out of the box.

Peaty 2/29/04

Cleaned, re-oiled and ready to go back in the airbox good as new.

Close up shows how nicely it cleans up, the screen and filter media material looks to be very good quality.

FWIW if you have a F-XT, WRX, WRX STi or an H6 motor the above PN 2019 is the one for you. That one will fit any Subaru that uses an MAF with the smaller airbox. If you have an MAP sytle intake like the newer Impreza RS or TS you need a larger filter, the one that goes inside the large black box just behind the throttle body. That PN is 2080.

Link to Silencer removal, a good thing to do with the above fliter:

http://www.scoobymods.com/forums/showthread.php?t=4475