K&N parts matching Luber-Finer AF3974 air filter

The Luber-Finer AF3974 air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many Luber-Finer air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Jeff, Santa Cruz, California
I replaced the stock type paper air filter on my 2008 Mazda 3 with a 33-2293 K&N replacement filter.  What I noticed from the first time I drove it with the K&N filter was a noticeable increase in throttle response and acceleration. This was at all throttle openings, but particularly at smaller throttle openings.  On top of this, mileage is a little better (1 MPG or so) than with the stock type paper filter.
Gislain Dmytrow, Verteillac, France
Entierement satisfait
Chris, McDonough, Georgia
Got my filter fast and it works great. I have it on my 09 maszdaspeed3 and it helped throttle response and woke the car up a little,. and you can even hear the turbo a little better. That being said, my stock filter was at least two years old before getting the K&N drop in. Next step, going to the dealer and letting them clean the intake for optimal performance.
33-2293 K&N 33-2293 Replacement Air Filter
List Price: $75.79
Your Price: $48.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Mark L. Burgess, Laguna Vista Texas
I have 4 cars all with K&N filters. No problems with any.
Edward Schrader, South Bend Indiana
I have used them before in my Jeep TJ. Outstanding. Abslutely the last air filter you will have to buy . Now I just traded for a different car and the first thing I did is replace the air filter with a K/N life time filter.
Dennis Lemke, Orange Park, Florida
Definitely put some zip in my MX-5! Easy to install. Fast shipping. This is my 4th vehicle with K&N filters or cold air intake!
33-2335 K&N 33-2335 Replacement Air Filter
List Price: $76.69
Your Price: $48.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Marek Kozolka, Bratislava, Slovakia
Mazda 2.0l 111kw 2011, the best buy for the car.. Ready for new exhaust system..:)
Tim Sides, Coedpoeth, United Kingdom
Okay, so first I have to thank the guy who said it fits the i-Stop Mazda 3, because I wasn't sure until I read that. Secondly, the air filter I took off was filthy, had grass in and everything, so basing my experience after that. Can I tell the difference? I think I can, but that might be wishful thinking, the car does feel more responsive, and whereas it had a tendency to stall starting off in cold damp weather, now it seems to be flawless. But I have only done about 100 miles since buying the filter. Am I happy with my purchase? Yes. Would I buy from again? No doubt.
Clive Williams, Leics, United Kingdom
I have been using K&N filters exclusively for 35 years and would use no other - I still have the my first K&Ns, which are destined for reuse. All our vehicles get a K&N at their first service. The current purchase was for a Mazda 3 I-Stop that appears to be a limited run design. Annoyingly, it is more expensive than the standard larger K&N for this vehicle. Purchase from K&N UK direct was as cheap as anywhere else with a delivery that was swift and trouble free. The replacement and fit were perfect as usual.
33-2999 K&N 33-2999 Replacement Air Filter
List Price: $83.49
Your Price: $53.99