The Screamin' Eagle air cleaners are now coming with a paper element. They are "rumored" to be falling apart and getting sucked into your motor. The Arlen Ness Big Sucker comes with a K & N filter and is affordably priced. It uses your existing A/C cover. Make sure you get the chromed version. I didn't know you had a choice and I ended up getting a painted grey version, it clashes with my jugs. Oh well, it still works great. They work on carbs and EFI motors.