Cold Air Intake Filter Question

[Irish Pride]

Ok, i'm getting ready to install my fender mounted intake, but i still have yet to purchase the filter. I've researched and been instructed that the filter commonly used is the K&N RC-3180. Now that filter has a little nub coming off the top of it for some reason. Here is my question - according to K&Ns website the filter height measures 3.5 inches, but it doesnt state if that is the height of the filter element without the nub or if it includes the nub. Can anybody clear this up for me? If the height is 3.5 inches including the nub then i guess that will be the filter to go with, but if it doesnt include the nub then i think i found a different filter that is half an inch taller that might work(RU-2990). Can somebody with this filter do a measurement for me?

 

[shomethe$$$]

Well the box is 4.5 inches on the smallest side so the 3.5" height one could assume is without the nub.

On a side note as all members have agreed upon, any oil filled cotton gauze filter should not be put on ANY car, unless you want crap going into the engine and oil film in the intake. There is a reason why manufacturers use paper. Stick with paper only. Plus that filter is a small, unless you want to jack you exhaust temps, bigger the better, atleast 600-1500cfm rating, I'm using a NAPA but its 4 times bigger than that one, so keep looking there are paper one's out there.

 

[Irish Pride]

Well the box is 4.5 inches on the smallest side so the 3.5" height one could assume is without the nub.

On a side note as all members have agreed upon, any oil filled cotton gauze filter should not be put on ANY car, unless you want crap going into the engine and oil film in the intake. There is a reason why manufacturers use paper. Stick with paper only. Plus that filter is a small, unless you want to jack you exhaust temps, bigger the better, atleast 600-1500cfm rating, I'm using a NAPA but its 4 times bigger than that one, so keep looking there are paper one's out there.

The box is 4.5 inches on the smallest side, but you still need to account for the mounting ******.

Also, with the fender mounted CAI the filter is mounted inside the fender well. It is the best way to get cold air into the intake, but it will also get dirty faster than inside the engine bay. It makes more sense to have a gauze filter that can be cleaned and reused as opposed to buying new paper filters over and over and over and over.

 

[LOUDSHO92]

Ok, i'm getting ready to install my fender mounted intake, but i still have yet to purchase the filter. I've researched and been instructed that the filter commonly used is the K&N RC-3180. Now that filter has a little nub coming off the top of it for some reason. Here is my question - according to K&Ns website the filter height measures 3.5 inches, but it doesnt state if that is the height of the filter element without the nub or if it includes the nub. Can anybody clear this up for me? If the height is 3.5 inches including the nub then i guess that will be the filter to go with, but if it doesnt include the nub then i think i found a different filter that is half an inch taller that might work(RU-2990). Can somebody with this filter do a measurement for me?

Ill have to see if I can measure mine but I believe it is for the filter only.

The RU-2990 filter is smaller then the RC-3180.

 

[Racer X]

Use the RC-3180, the round one won't clear the fender liner. Cap off the ****** with a vacuum cap or whatever will fit over it.

shomethe$$$, I've had a K&N in some way or another in my SHO's for over 8 years. On my first engine, I opened it up to find the cylinders still had their crosshatching on them after 215,000 miles. At least 100,000 of those miles was with a K&N filter installed. My current 3.2L has the CAI with the K&N in the fender well installed. It will get dirtier faster, and I don't recommend driving in heavy rain, but there's no detriment to using a K&N over a paper filter in my experience.

 

[frosho]

Use the RC-3180, the round one won't clear the fender liner. Cap off the ****** with a vacuum cap or whatever will fit over it.

shomethe$$$, I've had a K&N in some way or another in my SHO's for over 8 years. On my first engine, I opened it up to find the cylinders still had their crosshatching on them after 215,000 miles. At least 100,000 of those miles was with a K&N filter installed. My current 3.2L has the CAI with the K&N in the fender well installed. It will get dirtier faster, and I don't recommend driving in heavy rain, but there's no detriment to using a K&N over a paper filter in my experience.

Agreed, as long as you read the directions and don't over-oil it.

Oh, and someone said there's a reason manufacturers use paper elements... Yeah, they're CHEAP, and replaceable rather than serviceable. Dealers get to charge you dealer prices for a new one every time you go in for a tune up.

(Don't take this the wrong way - I'm not arguing that gauze/foam will filter the air any better than a paper filter, as I know that's not the case.)

 

[Eric VerValin]

95% sure that's the right one. I think I remember plugging that thing off. It's been a lil while since I last laid eyes on it. It fits better than you might think it would.