K&N parts matching Mobil AF3978 air filter

The Mobil AF3978 air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many Mobil air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Kai Wong, Alhambra, California
I have used K&N air filters since 2000. It was first tried on our '93 Town and Country mini van, when it was discovered that the dealer on whom we'd entrusted the van's maintenance, had kept the old filter for seven years. The difference was immediately apparent after the K&N installation. It just came alive. Could be the stuffed filter of eight decades restricted its performance and highlighted the advantage of the K&N. And we'd thought the poor performance of the van was due to its DNA. Since then, all our cars are fitted with K&N filters. The latest is the Jaguar that we'd bought in September of 15. The super charged V8 has grown imaginary wings.
Herbie , Philadelphia, Pennsylvania
I have been purchasing K&N products since 1995. I have yet to have a bad experience with any of their products. I would truely recommend K&N filters to anybody whom wish to get the most out of there vehicle's intake system. K&N is money well spent.
John Shadley, St Louis, Missouri
I am so very pleased with my new K&N Air Filters for my Jaguar. The product arrived quickly, both were easily installed, and promptly appreciated. There IS a noticeable improvement in performance. All this, done for less than the cost of a single filter change at the dealer. Thank you K&N.
33-2273 K&N 33-2273 Replacement Air Filter
List Price: $73.29
Your Price: $46.99