My brother had four K&N's laying around off his 87 GSXR1100. He took his airbox off and they will fit nicely on the manifold. New hose clamps that squeeze better are required. The filters are small as the 1100 needs four of them one next to the other. He is not running this quad w/ this set up. He got his pro flow kit. This was just a back up idea to be able to ride this weekend. I don't know if the small filters will flow enough air. They are free standing. Obviuosly one filter for the GSXR flows one cylinder or roughly 270cc. Comments welcome on this idea!!!!