Are K&N stock replacement air filters any good?

Question

If you've used one, do they make much difference regarding engine sound (I know they only add 1 to 4 hp)?

I want a bit more meaty engine note, without a drainpipe exhaust. NA engine.

Answer 1

The replacement filter won't make a sound difference alone but a induction kit will make a 'sucking' noise when you rev the engine. Get a nice performance exhaust that isnt loud but has a deeper sound for better effect. Powerflow would be good for this as you can specify the sound you want.

Answer 2

A stock replacement K&N will not really make a difference in noise (or power for that matter) The 1-4HP claim is a stretch and difficult to notice in a street driven car by average Joe's.

An open element type filter or "cold air induction" - with the tube and the cone filter on the end - will definately make more noise. Sometimes you can modify the stock inlet to allow the use of a cone filter, if the inlet size of the filter is the same or close to that of your stock system.

I was able to do this on my Acura and it made a difference in both sound and performance. If you don't have the tools, experience or know-how to build something yourself though, there are a lot of bolt-on systems for virtually any car that are easy to install.

Good luck!

Answer 3

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K&N air filters were great aftermarket add-ons when cars had carburettors. The air speed and associated vacuum effect meant that the fuel/air ratio was maintained (assuming that the carb jets were capable of the fuel flow required.Current engines with management systems are carefully designed to use the air filter that they were designed to use. Arbitrary replacement of the filter with a K & N one could cause the system to run 'off map' i.e. in a way that it was never designed to operate, and would inevitably result in worse performance, rubbish fuel economy and potentially a fuel mixture so weakened that long term engine damage may result. Remapping the system may work, but can be costly, for not much power gain. So the answer is don't throw a K & N on just for the sake of it. Cars that are sold with K & N filters as standard have been specifically designed to use them.

Answer 4

RE:
Are K&N stock replacement air filters any good?
If you've used one, do they make much difference regarding engine sound (I know they only add 1 to 4 hp)?

I want a bit more meaty engine note, without a drainpipe exhaust. NA engine.

Answer 5

Yes they are one of the best filters on the market. I have done some looking and checking myself for this same reason and about the only things that I can find is to use a resonator. I used one on an Audi Coupe GT and man did that make a huge difference. It went from sounding like a little zipper car to a big beefy rod.

Answer 6

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Answer 7

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Answer 8

Had mine for 12 years. (Chevy 350)
Stll works great.
Easy to wash.
NEVER have to keep replacing paper disposable filters.

Answer 9

I Have Not Tired One My Sealf But From What I Hear Thay Are Worth Ever Penny.. PPL Love Them!

Answer 10

.Love mine. pays for itself real quick. also removed the (noise eliminator) from the air box. What i mean i cut the opening out bigger. Noticed it rev up quicker and smoother.does no differance in exhaust sound but when i get on it ,it sounds like a good old 70`s four barrel . owner 93ta