K&N parts matching Champ Labs. AF3593 air filter

The Champ Labs. AF3593 air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many Champ Labs. air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
G Marshall, Lichfield, England
Brilliant service, speedy delivery. Have fitted to car with great ease and can feel the difference in performance immediately. Highly recommend fitting one of these on any car.
Keith Zollman, Phoenix, Arizona
I got this for my 2006 Audi S4, and it's a perfect fit. For those that are wondering / hearing that the K&N filter doesn't fit in the stock air box on the B7 S4, it does indeed fit, but it helps if you install it in a certain way. I tried dropping it in top first and pushing the bottom edge in, but I couldn't make it fit. But when I tried the other way - inserting the bottom first and then squeezing in the top edge, it was much easier. The top edge of the box must have more flex or something. Considering how difficult it is to replace the filter, and how little room there is to work around the engine, I am thrilled that I can leave the K&N filter in there for 50k miles if I want. Well, maybe I'll check at 30k. I recently went out and purchased K&N for all my other vehicles.
Christophe Leinhauser, Saint-Savin, France
Produit excellent comme toujours avec K&N Livré en 48h comme convenu même bien plus rapide que bien des sites de vente en ligne français. Ce que je regrette, c’est aucunes solution d’admission directe pour mon véhicule (audi a4 B7 2.0 TDI)
33-2209 K&N 33-2209 Replacement Air Filter
List Price: $85.29
Your Price: $54.99