![Amazon.com: K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Artic Cat Vehicles, KN-621 : Automotive Amazon.com: K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Artic Cat Vehicles, KN-621 : Automotive](https://m.media-amazon.com/images/I/81w7SgHos+S._AC_SL1500_.jpg)
Amazon.com: K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Artic Cat Vehicles, KN-621 : Automotive
![Amazon.com: K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Artic Cat Vehicles, KN-621 : Automotive Amazon.com: K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Artic Cat Vehicles, KN-621 : Automotive](https://m.media-amazon.com/images/I/81MDj8YNI7S._AC_SL1500_.jpg)
Amazon.com: K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Artic Cat Vehicles, KN-621 : Automotive
![K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Kawasaki Vehicles, KN-401 - Walmart.com K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Kawasaki Vehicles, KN-401 - Walmart.com](https://i5.walmartimages.com/asr/be56ab34-b0b6-4150-8cc4-ee5a164d3699_1.8dfd7bd945d62f1de9964343d34fdec8.jpeg)
K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Kawasaki Vehicles, KN-401 - Walmart.com
![Amazon.com: K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Artic Cat Vehicles, KN-621 : Automotive Amazon.com: K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Artic Cat Vehicles, KN-621 : Automotive](https://m.media-amazon.com/images/I/818tE8yfIqS._AC_SL1500_.jpg)
Amazon.com: K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Artic Cat Vehicles, KN-621 : Automotive
![Anybody know what happened to KN gold performance series oil filters? Bought the one on the left from amazon and it seems like cheaper quality, worse retention ring, a spring bypass... not Anybody know what happened to KN gold performance series oil filters? Bought the one on the left from amazon and it seems like cheaper quality, worse retention ring, a spring bypass... not](https://preview.redd.it/0tp6pfamwuu21.jpg?auto=webp&s=73457e76d138b41e60a42ccf2ec6b77057386c3b)
Anybody know what happened to KN gold performance series oil filters? Bought the one on the left from amazon and it seems like cheaper quality, worse retention ring, a spring bypass... not
![Premium Oil Filter: Ideal for Synthetic & Conventional Oil, Designed to Protect your Engine KN-621: Advance Auto Parts Premium Oil Filter: Ideal for Synthetic & Conventional Oil, Designed to Protect your Engine KN-621: Advance Auto Parts](https://shop.advanceautoparts.com/wcsstore/CVWEB/staticproductimage/1/large/22401318_knn_kn621_alt2_pri_larg.jpg)
Premium Oil Filter: Ideal for Synthetic & Conventional Oil, Designed to Protect your Engine KN-621: Advance Auto Parts
![K&N HIGH FLOW OIL FILTER FOR FORD 144 170 188 250 200 221 OHV CARB EFI 2.4 2.8 3.1 3.3L 3.6L 4.1L 16 - Mace Engineering Group K&N HIGH FLOW OIL FILTER FOR FORD 144 170 188 250 200 221 OHV CARB EFI 2.4 2.8 3.1 3.3L 3.6L 4.1L 16 - Mace Engineering Group](https://www.maceengineering.com.au/WebRoot/ecshared01/Shops/mace/5DE0/EB7A/95A2/8F12/543E/AC10/003F/A451/OF621-Image_Website.jpg)
K&N HIGH FLOW OIL FILTER FOR FORD 144 170 188 250 200 221 OHV CARB EFI 2.4 2.8 3.1 3.3L 3.6L 4.1L 16 - Mace Engineering Group
![Amazon.com: K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Artic Cat Vehicles, KN-621 : Automotive Amazon.com: K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Artic Cat Vehicles, KN-621 : Automotive](https://m.media-amazon.com/images/I/61tkJ9t9NFL._AC_SS450_.jpg)