K&N parts matching AC Delco A3685C air filter

The AC Delco A3685C 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
Paul Jamieson, Auckland, New Zealand
Filter improved Prius performance. Good filter. I would have rated it 5 stars if it had been 20 cheaper.
Gardner L Harris, Garden Grove, California
As usual, the replacement air filter is noticeably superior to the OEM unit. My previous experiences in replacing filters on a 1980 Mercedes 300TD and two 1980s Volvo 145D vehicles indicate an increase in fuel economy and power during hill climbing. This was most obvious on the Volvos but could also be measured on the older Mercedes. Installation on the Prius was simple in itself but we have not yet driven it enough to check the fuel economy which is already 50+ MPG. There doesn't seem to be a measureable difference in horsepower but that figure may well be concealed by the operation of the hybrid system. I know for certain that the new filter will be beneficial simply because of the results with three other vehicles into which a K&N product was installed.
William Davis, Roseville, California
Just installed it on our 2005 Prius after we put one on my wife's 2015 Avalon Limited Hybrid. The Prius only has 27,000 miles on it. However, the K & N made about a 2 to 3 mpg difference in her 2008 Camry Hybrid XLE so I figured it would hopefully do the same for the Prius. This is the 6th car we have equipped with the K & N air filter we have also ordered one for my new 2016 Mustang GT Premium convertible. Forget about the gas savings, normally the engine air filter gets replaced every 2nd or 3rd oil change so after the 3rd air filter replacement, the K & N air filter is FREE for the rest of the time you own the vehicle. I normally keep all my vehicles over 200,000 or until they start flunking smog so you can see the definite financial advantage of the K & N that most people do NOT think about.
33-2329 K&N 33-2329 Replacement Air Filter
List Price: $82.79
Your Price: $52.99