This listing is for one set of 8 valve guides for all 2 valve air cooled Kawasaki fours 650-1100. These are precision machined from OEM type iron. These also feature internal spiral grooves for additional oil retention and longer life. I also have valve seals in my other listings. We offer custom valve train components and full cylinder head services specializing in vintage Japanese. Please contact me if you have any questions. Thanks for looking!