K&N Drop-In Filters

Cmike2780 · 06-25-2010, 02:55 PM

Anyone here try the K&N drop-in air filters? Any gains or just worthless?

I heard sometimes they over oil and it screws with the MAF sensor, any truth to that?

Install for anyone who is interested:
Difficulty 1-10: 1 very easy

New K&N Filter x 2

There are (2) clips holding each filter tray to each airbox. Just unhook, slide towards the front of the car & pull up.

Side by side comparison of stock Nissan filter & K&N. The K&N rubber gasket around the filter is slightly thicker than stock but will fit the tray & airbox. Don't worry about which direction the louvers face, it only fits if they are vertical.

Make sure the airbox is clean. I found a lot of old leaves in there. Taking that out alone will get some hp back.

Installation is the reverse. The K&N will be snug, but it does fit. You will have to muscle the clips back on.

Might as well clean the engine bay.

6MT · 06-25-2010, 02:58 PM

Yeah when installers "over-oil" these, they can throw a code for the MAF. When properly re-oilled, they never bother MAF's. You just need to be careful. No horsepower gains, they're just reusable.

Zsteve · 06-25-2010, 03:07 PM

Quote:

Originally Posted by 6MT

Yeah when installers "over-oil" these, they can throw a code for the MAF. When properly re-oilled, they never bother MAF's. You just need to be careful. No horsepower gains, they're just reusable.

Actually someone on here did a dyno before and after and gained 5 hp and tq. Also the air intake with these and the stock box is only 5 - 8 degrees above ambient so they are on par with Long tubes in that area too. They will also improve throttle response some. If you do the drop ins and do the Modshack fang vent DIY you are about as good as the long tubes gains for half the cost. All in all a good mod if you dont want to spend 500+ for an intake.

Jordo! · 06-25-2010, 04:51 PM

Quote:

Originally Posted by Zsteve

Actually someone on here did a dyno before and after and gained 5 hp and tq. Also the air intake with these and the stock box is only 5 - 8 degrees above ambient so they are on par with Long tubes in that area too. They will also improve throttle response some. If you do the drop ins and do the Modshack fang vent DIY you are about as good as the long tubes gains for half the cost. All in all a good mod if you dont want to spend 500+ for an intake.

Link?

Cmike2780 · 06-25-2010, 03:52 PM

Any vendors on this site selling this at a good price?

6spd · 06-25-2010, 04:45 PM

I got them a few months ago and yes, if you are an "aware" person, you will notice a throttle response difference and sound difference. Definitely worth $70ish bucks any day.

6spd · 06-25-2010, 04:57 PM

370Z K&N Dual Air Filter

somewhere in here

Endgame · 06-25-2010, 05:05 PM

I have some that will be at my house and installed by August. Can't wait!! But, I am also installing a Powerhouse Amuse Y Pipe and R1 exhaust with a Cobb AAM tune... so my performance gains will be skewed some...

Jordo! · 06-25-2010, 05:09 PM

Ah, found it

370Z K&N Dual Air Filter

Hmmm... would like to see data from at least one more car, but that certainly makes me think a drop-in wouldn't be bad for some easy extra ponies for now...

EDIT: Ordered... will keep me amused for now...

6spd · 06-25-2010, 05:19 PM

Yeah, I mean even if you buy them and only use them for a short time, they were still very cheap and fun for the time.

6spd · 06-25-2010, 05:21 PM

Oh yeah, just dont buy any other brand filter that are foam or what not. Ive seen some data about air flow and filtration, and K&N is by far superior to brands' filters like HKS and Apexi.

Jordo! · 06-25-2010, 08:35 PM

Quote:

Originally Posted by 6spd

Oh yeah, just dont buy any other brand filter that are foam or what not. Ive seen some data about air flow and filtration, and K&N is by far superior to brands' filters like HKS and Apexi.

Oh definitley -- foam filters offer terrible filtration and if they begin to degrade, you can draw foam particles into the motor

They do offer good flow, however, so for a track only car they might be worthwhile.

Also, interestingly enough, the K&N media offers superior filtration even to the excellent AEM dryflow filters -- at least until they are both PACKED with dirt. Then the AEM flows better -- solution: clean the K&N.

For a cone filter I'd only use K&N or the AEM dryflows, the latter winning out only because they're so easy to clean and no concern regarding overoiling/dirtying MAF sensors.

That said, if the sensor does get gunked: Amazon.com: CRC 05110 Mass Air Flow Sensor Cleaner - 11 Wt Oz.:…

Driftomodachi · 08-17-2013, 12:10 PM

Quote:

Originally Posted by 6spd

Oh yeah, just dont buy any other brand filter that are foam or what not. Ive seen some data about air flow and filtration, and K&N is by far superior to brands' filters like HKS and Apexi.

Actually, Apexi makes the best filter. Here is a comparison:

Car Filter Review

kfull · 08-17-2013, 09:16 PM

Only had my K&N's in for about a week, no problems so far. I don't know if it's just in my head or if I actually got gains, but it feels like I have slightly better throttle response and power. I think the engine sound/exhaust sound is a bit louder too (which I like). The stock filters were fairly dirty anyways, so I'm sure the engine is breathing better in any event.

Cmike2780 · 06-25-2010, 05:52 PM

Josh from Stillen is gonna hook me up with good price on a pair of filters. I could always re-sell them if I decide to go with a CAI. 5 hp for something this inexpensive is pretty good. Less headache from the dealer also.

06-25-2010, 02:55 PM	#1 (permalink)
Cmike2780 A True Z Fanatic Join Date: Jun 2010 Location: Long Island Posts: 5,059 Drives: slowwww Rep Power: 29	K&N Drop-In Filters Anyone here try the K&N drop-in air filters? Any gains or just worthless? I heard sometimes they over oil and it screws with the MAF sensor, any truth to that? Install for anyone who is interested: Difficulty 1-10: 1 very easy New K&N Filter x 2 There are (2) clips holding each filter tray to each airbox. Just unhook, slide towards the front of the car & pull up. Side by side comparison of stock Nissan filter & K&N. The K&N rubber gasket around the filter is slightly thicker than stock but will fit the tray & airbox. Don't worry about which direction the louvers face, it only fits if they are vertical. Make sure the airbox is clean. I found a lot of old leaves in there. Taking that out alone will get some hp back. Installation is the reverse. The K&N will be snug, but it does fit. You will have to muscle the clips back on. Might as well clean the engine bay. 2sl0w likes this. __________________ [09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R] [ArchitTEK Photography] Last edited by Cmike2780; 07-02-2010 at 10:34 PM. Reason: Install

06-25-2010, 02:58 PM	#2 (permalink)
6MT A True Z Fanatic Join Date: May 2009 Location: ITU Zone 2 Posts: 22,459 Drives: Reliant Robin Rep Power: 1790	Yeah when installers "over-oil" these, they can throw a code for the MAF. When properly re-oilled, they never bother MAF's. You just need to be careful. No horsepower gains, they're just reusable. __________________ Andrew 2009 370Z Sport/Touring 6MT sold 2013 Honda Civic Si coupe D/D

06-25-2010, 03:52 PM	#5 (permalink)
Cmike2780 A True Z Fanatic Join Date: Jun 2010 Location: Long Island Posts: 5,059 Drives: slowwww Rep Power: 29	Any vendors on this site selling this at a good price? __________________ [09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R] [ArchitTEK Photography]

06-25-2010, 04:45 PM	#6 (permalink)
6spd A True Z Fanatic Join Date: Aug 2009 Location: South Florida Posts: 3,001 Drives: Q50RS Rep Power: 25	I got them a few months ago and yes, if you are an "aware" person, you will notice a throttle response difference and sound difference. Definitely worth $70ish bucks any day. __________________ -Jay- jonathanjamesphotographer.com

06-25-2010, 04:57 PM	#7 (permalink)
6spd A True Z Fanatic Join Date: Aug 2009 Location: South Florida Posts: 3,001 Drives: Q50RS Rep Power: 25	370Z K&N Dual Air Filter somewhere in here __________________ -Jay- jonathanjamesphotographer.com

06-25-2010, 05:05 PM	#8 (permalink)
Endgame A True Z Fanatic Join Date: Nov 2008 Location: Phoenix Posts: 1,613 Drives: Nothing Now! Rep Power: 224	I have some that will be at my house and installed by August. Can't wait!! But, I am also installing a Powerhouse Amuse Y Pipe and R1 exhaust with a Cobb AAM tune... so my performance gains will be skewed some...

06-25-2010, 05:09 PM	#9 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	Ah, found it 370Z K&N Dual Air Filter Hmmm... would like to see data from at least one more car, but that certainly makes me think a drop-in wouldn't be bad for some easy extra ponies for now... EDIT: Ordered... will keep me amused for now... __________________ Enjoy it. Destroy it. Last edited by Jordo!; 06-25-2010 at 05:20 PM.

06-25-2010, 05:19 PM	#10 (permalink)
6spd A True Z Fanatic Join Date: Aug 2009 Location: South Florida Posts: 3,001 Drives: Q50RS Rep Power: 25	Yeah, I mean even if you buy them and only use them for a short time, they were still very cheap and fun for the time. __________________ -Jay- jonathanjamesphotographer.com

06-25-2010, 05:21 PM	#11 (permalink)
6spd A True Z Fanatic Join Date: Aug 2009 Location: South Florida Posts: 3,001 Drives: Q50RS Rep Power: 25	Oh yeah, just dont buy any other brand filter that are foam or what not. Ive seen some data about air flow and filtration, and K&N is by far superior to brands' filters like HKS and Apexi. __________________ -Jay- jonathanjamesphotographer.com

08-17-2013, 09:16 PM	#14 (permalink)
kfull Track Member Join Date: Mar 2012 Location: Massachusetts Posts: 909 Drives: A lot Rep Power: 15	Only had my K&N's in for about a week, no problems so far. I don't know if it's just in my head or if I actually got gains, but it feels like I have slightly better throttle response and power. I think the engine sound/exhaust sound is a bit louder too (which I like). The stock filters were fairly dirty anyways, so I'm sure the engine is breathing better in any event. __________________ 2012 GM 6MT sports package \| FI non res cf exhaust \| K&N Drop Ins \| Viper 3303 security system w/ tilt sensor \| GTR start button \| 35% rear 45% side window tint \| Michelin PSS

06-25-2010, 05:52 PM	#15 (permalink)
Cmike2780 A True Z Fanatic Join Date: Jun 2010 Location: Long Island Posts: 5,059 Drives: slowwww Rep Power: 29	Josh from Stillen is gonna hook me up with good price on a pair of filters. I could always re-sell them if I decide to go with a CAI. 5 hp for something this inexpensive is pretty good. Less headache from the dealer also. __________________ [09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R] [ArchitTEK Photography]

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