K&N parts matching Mann-Hummel C31122 air filter

The Mann-Hummel C31122 air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many Mann-Hummel air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Daniel Suarez , Corona, California
My car never felt so smooth. Hard to believe how such a simple upgrade can have such an impact, and I wouldn't doubt this filter also improves the engine's performance and even its gas mileage.
RadioDad, Bethesda, Maryland
A great air filter!! Love it!! I Replaced the standard paper-style filter on my 2001 Saab 9-3 convertible, and was amazed that something so simple could yield the noticeable power increase. I would guess an extra 10 HP. It really shows in when accelerating from 20 - 40 in 2nd gear. The car used to sputter slightly in that power band, but now it is much smoother. Not bad for an engine with 155K miles on it!
Matt Swails, Antelope, California
Superb! Goes super fast!
33-2165 K&N 33-2165 Replacement Air Filter
List Price: $98.59
Your Price: $63.99