K&N parts matching AC Delco A3663C air filter

The AC Delco A3663C 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
Gunnar Gothoni, Espoo, Finland
Perfect fit replacement to original air filter. Really woke up my LR3's 4.4L V8, specially in the upper RPM. Feels also like there are some more torque at lower end RPM. Engine sounds like much more healthier breath across RPM range. Seeing forward to see if it even improves MPG.
Dean Young, Australia
As usual, great product, swift delivery, easy to install , instant difference when driving and fast delivery....very highly recommended......
Fraser Macleod, Toomebridge, United Kingdom
Excellent service from K&N as expected and the quality of my panel filter is excellent and was extremely easy to fit in the existing air box. I prefer the quality of K&N Filters over any other and love the difference it makes to my Range Rover Sport compared to a standard filter and the fact that it will outlast and out perform any other that I have tried. Thank you K&N for excellent quality filters.
33-2333 K&N 33-2333 Replacement Air Filter
List Price: $79.49
Your Price: $50.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Russ Scott, Denver, Colorado
2011 Range Rover Sport Supercharged The replacement filters were noticeable immediately. It takes less throttle to get the acceleration you want, fuel economy went up 2-3 miles per gallon and my exhaust definitely has a deeper/throaty sound. Overall the drive ability was improved, power feels like 15-18hp increase, and fuel usage had instant improvement. I have K&N's in my 2011 VW Touareg TDI and 2014 Audi S6same experience with all my vehicles!!!!!
Ahmed Almehairbi, United Arab Emirates
Very good.
Kurt Neumaier, Post Falls, Idaho
My first K&N Air filter for this vehicle. Impressed that the engine actually sounds happy because the airflow is increased. I had expected a louder engine intake but nope, it was quiet and you could feel the smooth extra power from it. Judging from the factory filters taken out I will keep an eye on these. But very happy so far.
33-2446 K&N 33-2446 Replacement Air Filter
List Price: $147.29
Your Price: $94.99