K&N parts matching Service Champ AF4278 air filter

The Service Champ AF4278 air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many Service Champ air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Daniel Williams, Lakeland Florida
This product surpassed my expectations. I highly recommended for a'll vehicle's
Lucas Frommelt, Naperville, Illinois
Going into this product, I wasn't expecting a lot. But WOW! What a change. Who knew an air filter could provide such a change? I just put it into my 3.5L V6 2005 Nissan Altima, and I've noticed an increase in acceleration already. I have nothing on MPG yet, because I have just installed it. The engine has also developed this new sporty whine to it at around 4K+ RPMs. Loving this new air filter!
Scott Ellison, Albertville, Minnesota
Easy to order,easy to install.Gained 2MPG. Highly recommend.
33-2031-2 K&N 33-2031-2 Replacement Air Filter
List Price: $79.99
Your Price: $51.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Kevin , Knebworth, United Kingdom
Excellent product, arrived next day, engine now breathes a bit more freely.
Robert Fitzwater, Marysville, Ohio
I purchased this for my 2006 Subaru Forester 2.5X. Installation was simple, and with the first tank of gas, my gas mileage increased by 2 MPG. It even sounds stronger. The Forester has 130,000 miles and is a 5 speed manual.
Ronald Modzelewski Jr, Crawfordville, Florida
Awesome felt and heard the difference immediately.
33-2075 K&N 33-2075 Replacement Air Filter
List Price: $81.99
Your Price: $52.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Lorna Meadows, Grantham, United Kingdom
Great website, very easy to find what you want. Fast delivery, items as described. Would highly recommend.
Daniel Sepulveda, Placerville, California
Product arrived quickly, packaged well, works great! Very pleased. THANKS K&N!
Dusan Chrenko, Nitra, Slovakia
Everything was allright. Order, shipping, package, installation instructions. I am 100% satisfied.
33-2232 K&N 33-2232 Replacement Air Filter
List Price: $86.99
Your Price: $55.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
33-2336 K&N 33-2336 Replacement Air Filter
List Price: $93.99
Your Price: $60.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Fahad Dossary, Dammam, Saudi Arabia
Amazing product .
Eric Bowmaster(Minitel Comm.), Ottawa, Canada
Improved gas mileage and performance immediately. My distance to empty gauge went from 85km to 100 in 2km drive. May not be the most accurate but gives indication of real world improvement.
Jeremey, California
Great replacement.
33-2374 K&N 33-2374 Replacement Air Filter
List Price: $85.99
Your Price: $54.99