K&N air filters

[H8t0w8]

Is anyone running a K&N air filter? Im keen to hear your thoughts or reviews.
Did you notice any performance increase?
Worth the extra cost?
(Considering the service intervals)

Thanks in advance.

Sent from my SM-G935F using Tapatalk

[MadAboutCars]

I'm using one on my S6 with a tune, plus I've added a couple of extra holes in my air box. Nice sound under hard acceleration and goes well.

[P_G]

Running a Pipercross foam filter in mine and it is just breaking in. It may be placebo in a car this size but throttle pick up is better, will dyno the car soon to see what figures it is doing now that I've been running it on 98RON fuel for a few thousand miles rather than the 95 that it came with.

K&N are OK but like BMC are a pain to maintain / oil. Pipercross and ITG being foam are easier to maintain.

[ntsantos]

Running a Pipercross foam filter in mine and it is just breaking in. It may be placebo in a car this size but throttle pick up is better, will dyno the car soon to see what figures it is doing now that I've been running it on 98RON fuel for a few thousand miles rather than the 95 that it came with.

K&N are OK but like BMC are a pain to maintain / oil. Pipercross and ITG being foam are easier to maintain.

+1 on the foam. I've been running the ITG for a few weeks and will agree on the increased throttle response. It's a lot louder too if you're in to that. A little too loud at times, but I don't plan on changing it . It's a little pricey, but after 2 scheduled changes, it pays for itself.

I've had a k&n, cleaning kit and stock airbox in the classifieds. Let me know if you're interested. You can cut holes in the stock box without having to touch your oem box.

[luv2sleep]

I have a Pipercross foam filter with the stock box. I think the car definitely breaths better now and the low end throttle response seemed to have improved. The intake "woosh" sound is louder as well. Overall, I'm happy with it. It took a while to get the Pipercross air filter from them direct from U.K. You can find them on eBay for a few bucks more.

[VVG]

I am running a K&N on my S6. Definite improvement in initial throttle response. It is a good bang for the buck mod.

[Roadwarrior]

I'm using one on my S6 with a tune, plus I've added a couple of extra holes in my air box. Nice sound under hard acceleration and goes well.

1 week with my S6. Why did you cut holes in your airbox? Sound? If so, how much more do you hear? Since I am new here, I am trying to learn all i can.

Thanks!

[zoomzoom!]

Wasn't there a study done years back that indicated that K&N (and other aftermarket) filters are a waste of money, and don't really gain you anything? I get the sound piece...I'm talking actual performance.

[MadAboutCars]

1 week with my S6. Why did you cut holes in your airbox? Sound? If so, how much more do you hear? Since I am new here, I am trying to learn all i can.

Thanks!

More sound and more air. Like the mod Audi did to the RS7 air box. Two one inch holes in my case are just perfect for both. Still quiet cruising around with a nice turbo sound when you gun it.

[P_G]

Wasn't there a study done years back that indicated that K&N (and other aftermarket) filters are a waste of money, and don't really gain you anything? I get the sound piece...I'm talking actual performance.

You don't get power gains but I have seen better throttle response and marginally improved mpg plus the sound bit from using them for the last 10 years on various cars

[VVG]

Wasn't there a study done years back that indicated that K&N (and other aftermarket) filters are a waste of money, and don't really gain you anything? I get the sound piece...I'm talking actual performance.

You don't get power gains but I have seen better throttle response and marginally improved mpg plus the sound bit from using them for the last 10 years on various cars

You get better throttle response because the better flowing filter will allow you to get to your peak power output a tad quicker So, if you look at the power curve, you may see a measured hp gain at a lower rpm, but it won't be an increase in peak hp, just that your peak hp may come a few hundred rpm sooner. This is how these filter people can advertise a power "gain" at a certain rpm.

Subjectively the throttle feels more responsive off the line, but I doubt it is significant enough to translate to any real world change in acceleration numbers. It is still a good bang for the buck mod, even for the subjective feel, however.

[Sd76]

More sound and more air. Like the mod Audi did to the RS7 air box. Two one inch holes in my case are just perfect for both. Still quiet cruising around with a nice turbo sound when you gun it.

Do you have pics of the box with the cuts?


Sent from my iPhone using Tapatalk

[P_G]

You get better throttle response because the better flowing filter will allow you to get to your peak power output a tad quicker So, if you look at the power curve, you may see a measured hp gain at a lower rpm, but it won't be an increase in peak hp, just that your peak hp may come a few hundred rpm sooner. This is how these filter people can advertise a power "gain" at a certain rpm.

Subjectively the throttle feels more responsive off the line, but I doubt it is significant enough to translate to any real world change in acceleration numbers. It is still a good bang for the buck mod, even for the subjective feel, however.

The majority switch off when I start talking about area under the curve etc so I revert to just saying power gains i.e. peak figures! Of which there are probably none or certainly none your bum dyno can feel but like you say initial pick up and response is improved.

[MadAboutCars]

Do you have pics of the box with the cuts?


Sent from my iPhone using Tapatalk

Here you go:

[Sd76]

Here you go:

Thanks. So two cylindrical cutouts back there can make a diff in sound. You think it might help stock A7 engine? Probably better if I got the awe touring exhaust.


Sent from my iPhone using Tapatalk

[ntsantos]

More holes:


Plus



Equals very loud A7 intake.

[MadAboutCars]

Thanks. So two cylindrical cutouts back there can make a diff in sound. You think it might help stock A7 engine? Probably better if I got the awe touring exhaust.


Sent from my iPhone using Tapatalk

Yes, it does and for me a noticable difference in response. I started with one hole with the intension of going to 4, but two was just perfect for the 4.0, producing a nice turbo sound, but only under heavy acceleration, especially from a standing start. The holes also allow debris to flow out of the air box.

[BEEZER]

Nice!

[Roadwarrior]

My final solution- KN filter. RS6/7 intake box. total cost under 400 bucks and took my 20 minutes to install myself. More sound and but dyno is favorable albeit unreliable.

[bigchunk]

Exact same as the way I went, managed to get a second hand RS7 airbox on eBay German site 9i am in the UK) fitted it with the K&N and happy with the outcome.

[Logtec]

Exact same as the way I went, managed to get a second hand RS7 airbox on eBay German site 9i am in the UK) fitted it with the K&N and happy with the outcome.

Do you feel better throttle response? Is your car tuned?

[Miami4me]

I did a similar mod a couple years ago on a naturally aspirated Porsche 911 (a 997S), essentially bypassing part of the OEM air box. It took me 20 minutes to install a new $20 hose. The throttle response felt better, but the car was tuned and had 200 cell cats, so it's hard to tell if the hose had any real performance impact. It had a huge sound impact, though, which I loved.

The consensus in the forums seemed to be that this didn't have much effect on the forced induction cars. Maybe it was just a Porsche thing, but heck, that's Audi's cousin. If a couple of holes in the air box will get me there, sign me up. It looks pretty low risk.

MadAboutCars, did you just drill out the holes with a 1" bit?

[dannybear]

I have upgraded to a rs6 box and k&n filter. Intake Sound is now noticable. Power (in my opinion) is in your head as you hear more so think it's faster. I like the slight added sound but won't forget i bought a sleeper car and that's what I like about it...No point trying to convert it to something else. If you don't want a sleeper car IMO buy a different car.

Generally speaking a louder rougher car feels faster....Doesn't mean it is!


Sent from my Pixel XL using Audizine mobile app

[MadAboutCars]

I did a similar mod a couple years ago on a naturally aspirated Porsche 911 (a 997S), essentially bypassing part of the OEM air box. It took me 20 minutes to install a new $20 hose. The throttle response felt better, but the car was tuned and had 200 cell cats, so it's hard to tell if the hose had any real performance impact. It had a huge sound impact, though, which I loved.

The consensus in the forums seemed to be that this didn't have much effect on the forced induction cars. Maybe it was just a Porsche thing, but heck, that's Audi's cousin. If a couple of holes in the air box will get me there, sign me up. It looks pretty low risk.

MadAboutCars, did you just drill out the holes with a 1" bit?

I used a 1" circle cutter. It has a small drill bit in the middle and a 1 inch saw tooth cone around the outside.

[Miami4me]

Perfect. Thanks.

[Gonzoe11]

K&N filter installed yesterday replacing the OEM filter. I'm on a stock S7 air box. It's subtle but adds slight intake noise. I can hear the air and turbos spooling. I may try adding some holes next. Not sure if it's placebo effect or added grunt, but the car feeling slightly more responsive.
The filter is cheap enough no reason not to try it.


Sent from my iPad using Tapatalk

[R3.]

I added one to my A6 on Friday. So far so good. I don't realize notice a difference.


Sent from my iPhone using Audizine

[bigchunk]

Do you feel better throttle response? Is your car tuned?

No tune but fitted it within a few days of having my exhaust centre box removed, so sounds much better, which is possibly fooling me into thinking the throttle response is better, not by miles though.

[nefkntym]

RS7 airbox with RS7 K&N filter and EPL Stage 1 tune. Better throttle response and lots of good noises with a factory look.

[1975audi]

More holes:


Plus



Equals very loud A7 intake.

Can you please share where you purchased the air filter.
Is that a rs7 air filter box?

[ntsantos]

Can you please share where you purchased the air filter.
Is that a rs7 air filter box?

Griffin motorworks:
http://www.audizine.com/forum/showthread.php?t=721911

Yes that is an Rs7 box, purchased through ECS.

[mjfloyd1]

Is it foam over a pleated dry paper filter?

[ntsantos]

Is it foam over a pleated dry paper filter?

No, it's all foam.