K&N parts matching AC Delco A3665C air filter

The AC Delco A3665C 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
Antony, Virginia
Filters were easy to replace, no problems.
Dustin Vackar, San Antonio, Texas
Wanted a cold air intake, but this will have to do.
Steve Frederick, West Chester, Pennsylvania
For the past 18 years I have used K&N air filters in all my vehicles. Currently, I own a 2010 Acura RL in which I installed the correct corresponding K&N filter two years ago. Recently I purchased a 2010 pre-owned Lexus LS 460 and on November 20, 2013 I had two K&N filters intalled in this vehicle. As with past vehicles, I am looking forward to better performance and improved gas mileage in these two vehicles. SGFrederick
33-2381 K&N 33-2381 Replacement Air Filter
List Price: $85.89
Your Price: $55.99