Vintage Mustang Forums banner

K&N Air Filter, Worth it?

1016 Views 12 Replies 8 Participants Last post by  Guest
I know what you've heard, well did it help you? I don't see how I can get more horsepower than my thin paper element.. I mean the K&N's look more restrictive than anything else to me.... Hell I've ran my car without an airfilter and didn't notice any difference /forums/images/icons/smile.gif

See my 69 convertible and the VMF parking lot at:
1 - 13 of 13 Posts
On every naturally aspirated car I've driven and installed a K&N, I have noticed NO difference... HOWEVER, on turbo engines there is a seat of the pants difference, enough of one you can feel it. FWIW


'72 Mach 1 || '90 Talon TSi AWD
"Thats not a leak, my car's marking its territory!"
"If you've done it, it ain't braggin'." -Roy Rogers
On the 2.3 Turbo there was a noticeable difference in sound but the original aircleaner set up was very restrictive. I am not sure if there would be a difference with an open element. Years ago I bracket raced a car with and with out the open element filter. No difference at all.

FWIW Consumer reports once tested it and found that nothing changed. It least nothing they could measure.

Gene J
66 Coupe/66 Convert/84 GT Turbo/96 coupe

Gene's cars
I have never been able to tell a difference

68 Fastback.
I got a K&N filter and the top filter also and can tell no difference. I bought the top filter with plans to use it with my paper filter since they advertise it as "fits any 14" element"..WRONG, I had to get their round filter to make things fit, so now I have a 110.00 air filter on my carb.

1966 fastback,289,C4,Tri-Y,Pertronix,Edelbrock
There is one very important will never buy another air can clean them. Have them on all my cars. You can feel the difference on the fuel injected cars and very little on the carberated cars.

Stewart A. Smith
1968 Cougar XR-7
I went back to my original air cleaner assembly, taking the K&N off, and I honestly cannot tell the's still fast.


1969 GT S-Code Convertible

Previously known as: jansawj
On the race car, the co-ordinated filter and housing from K&N were worth about .05 seconds over no air filter.....the housing helps straighten the airflow prior to entry to the carb.

More importantly, it keeps the air clean, given the dust and debris at the race track...which lengthens engine life...

Got one in my '91, can't tell any difference.

Someone please buy my Ski Doo!
68 fastback, 390 4V premium fuel
80 5.0 hatch, just finished
91 5.0 coupe, daily driver
84 RamCharger 4x4 extreme mudsliger and winter junker
Never noticed a difference in perfomance either. Bought it because it can be cleaned & re-used.
Ok, finally got logged in with new password -- I wrote it down wrong so it wouldn't work.
On filters, check out the following:
just bought mine yesterday, can't tell any difference....

got it cause i can clean and reuse it....i hope...

65 pony from ground up, inline 6 (son's car),
66 Red Convertible, 289(dad's car)
I dont notice a difference with mine but it traps more debree and you never need another one...

1 - 13 of 13 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.