K&N parts matching AC Delco A3645C air filter

The AC Delco A3645C air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many AC Delco air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Andrew Williams, Mobile, Alabama
I love the K&N brand and this filter. It dropped in perfectly and is a nice replacement to the regular filters. Plus, I love the fact that it is washable and the lifetime warranty is a plus.
Allie, Maryland
Helped save on gas.
Steve, Iowa
Awesome product. My gas mileage has gone up a bit as advertised.
33-2451 K&N 33-2451 Replacement Air Filter
List Price: $84.19
Your Price: $54.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Gregory Scott, Dayton, Ohio
I noticed an immediate increase in the air intake flow. I am awaiting installation of a turbo bypass solenoid. Once that is done, I will be able to determine the impact of the filter on performance.
Greivin Fallas, Costa Rica
Very easy to install. I have more HP and more performance.
Keith Edwards, New York
Great starting piece to get more power for your car. It's like your car can breathe with no congestion.
33-2482 K&N 33-2482 Replacement Air Filter
List Price: $82.19
Your Price: $52.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Alan Brady, Maple Ridge, Canada
Fast delivery, easy installation, and improved horsepower with more air flow. Thanks
Patricia Pelletier, Victoria, Canada
I always buy K&N filters for every vehicle that I have ever owned and will continue to do so. I get better gas mileage and they last forever and I dont have to continue buying cardboard filters all the time. I just clean my K&N filter and put it back in the car so it saves me a lot of money in the long run.
Glenn Lee, Changi, Singapore
Had a K&N filter installed in my previous car and obviously had to have it installed in my current car. These things are really good and I'm not sure if it's psychological, but fuel consumption improved quite a bit even though there were moments I'd be a little more aggressive on the accelerator. Pick up feels more responsive than before as well. Whatever the case, K&N offers a great product for a fair price and their service and after sales service are both excellent. I recommend their products to friends when the topic on cars is brought up.
33-5050 K&N 33-5050 Replacement Air Filter
List Price: $77.99
Your Price: $49.99