These replacement o-rings are used with the 500/661 air filter kits.
NOTE: The site will automatically calculate Priority Mail Flat Rate for shipping during checkout. When you only order o-rings (and no other products) we will send them to you via First Class Mail and will refund you the difference when that occurs.
O-ring (replacement for the 500/661 Air Filter Kit)
Great parts great service cheers guys
Quality made products, finally a solution to the problem with the 500i