K&N parts matching Wesfil WA5277 air filter

The Wesfil WA5277 air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many Wesfil air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Matthew Lepito, Jarrettsville, Maryland
This filter eliminated the throttle lag in 2nd gear and gave my F-sport a much more linear acceleration. I can't say anything about more power, but it feels much better when I drive hard. Definitely a noticeable difference.
George Baker, Chicago, Illinois
Had a K&N air filter in my Audi and it added a touch of response to throttle, and low and behold, it accomplished the same with my Lexus IS 250. You can actually sense the engine breathing a little easier on take off. I am not talking drag racing here, but rather a more pleasant feel to the first fraction of an inch of gas pedal depression. I did notice that the price has creeped up, say 30 over 10 years, but what are you gonna do. For me, it's worthwhile. How many performance enhancements are there that a novice can install w/o voiding the warranty. A nobrainer.
Christopher Smith, Mississauga, Canada
Works great in my 2015 is250. Felt a slight 3hp bump on my acceleration.
33-2452 K&N 33-2452 Replacement Air Filter
List Price: $95.99
Your Price: $61.99