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
Nicolas Khoury , Senlis, France
Correspond parfaitement à mon véhicule. Merci. Cordialement.
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.
Michael Palmieri, Hilton Head Island, South Carolina
I have used K&N filters on motorcycles, but this is the first time in a vehicle. Don't know why I messed with OEM filters in my vehicles. As soon as I installed the K&N there were the three common things I should have expected: Elimination of ever-slight hesitation from a stop when applying the accelerator, smoother shifts in the transmission (as a result of the engine breathing better) and finally, more acceleration when sending the RPM's north. The car sounds the same, it did not get louder nor does it have any funny air intake sounds. Sounds stock, runs better. Plus this is the last filter I will ever need to buy.
Alden, Pennsylvania
I have used K & N filters for over twenty years in different vehicles that I owned. It started with motorcycles and went to snowmobiles and now all my cars and trucks. If your planning to do intake and exhaust improvements,start with a K&N, its cheap and if the filter is all you want to do, you will see an improvement.
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
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.
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.
33-2999 K&N 33-2999 Replacement Air Filter
List Price: $83.49
Your Price: $53.99