I have a sample K&N filter and it fits great! To order a filter you need to contact Dan Shoemaker Product Specialist: Phone: (951) 826-4187, Fax: (951) 826-4007
It would be there filter number TB-0300 but 4.5″ tall. The cost would be $88.69 each. These are reusable!
Good luck and let me know how the work out!