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
Ojay Lewis, Connecticut
Today was the the first day I used the K&N air filter in my 2003 Maxima SE. I use my cruise control option every day on my drive back and froth to work. Going home from work my MPG went from 26 that I would normally get from the stock air filter to 30-31 MPG and going to work 34 to 38 MPG with the K&N. This air filter gives an extra 90 to 95 MPG per full tank of gas. Today the way the gas prices are going this was a big help me and my family. Thanks K&N!
Kandi Uffer, Lake Forest, California
The performance of the vehicle was markedly better after installing the air filer so much that I was truly amazed. The engine can breath a lot better and the gas mileage has improved. I really like the idea of just cleaning the filter instead of replaceing it every so often too. It's really a great product. Thank you so much, I am spreading the word.
Michael, Las Vegas, Nevada
Product works as advertised. I didn't get a noticeable increase in power, but my throttle response and idle is better, and my engine revs faster and higher
33-2031-2 K&N 33-2031-2 Replacement Air Filter
List Price: $77.99
Your Price: $50.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
John Slomczewski, Colorado
Ordered and received the air filter and free limited-edition Mustang Matchbox car. Being a limited-edition car, it was well worth the $55 and thanks for throwing in the free air filter. All kidding aside, I currently have 3 vehicles and this is now the 3rd one with a K&N air filter. I think your product is great. The fit is always right on, and being permanent (not throwing it in the landfill) is a big plus for me.
Bob Thompson, Idaho Falls, Idaho
Perfect fit and hopefully improves mileage but too early to tell.
David Scott, Carrickfergus, United Kingdom
Very well pleased with my filter for my car, Suzuki Swift Sport 2017. Pulls better. Would recommend buying direct from K&N Very good service.
33-2075 K&N 33-2075 Replacement Air Filter
List Price: $80.09
Your Price: $51.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Jerry Nye, Charleston, Tennessee
I have been using K&N Filters on about every motorized vehicle that I have owned in the last two decades. I am a K&N kind of guy.
Alejandro Cardenas, Bogota D.C., Colombia
There was a delay in the delivery here, because the bill was not sent with the package.
Alex Hamm, Weitbruch, France
Très bonne qualité rien à voir a un filtre normal je recommande à 100
33-2232 K&N 33-2232 Replacement Air Filter
List Price: $84.29
Your Price: $53.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
33-2336 K&N 33-2336 Replacement Air Filter
List Price: $86.59
Your Price: $55.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Jeremey, California
Great replacement.
Fahad Dossary, Dammam, Saudi Arabia
Amazing product .
Wayneworth Morrison, Tampa, Florida
Very satisfied.
33-2374 K&N 33-2374 Replacement Air Filter
List Price: $83.69
Your Price: $53.99