Complete set of 4 intake and exhaust valve guides with seals for the Yamaha XT550 '82-'83, TT600 '83-'86, XT600 '84-'95. Precision manufactured from C63000 nickel bronze (Ampco45) for superior heat conductivity and wear characteristics. They are also designed to use a valve seal that the OEM guides lack. A must have for any rebuild and are compatible with all modern fuels and synthetic oils. These guides include premium metal clad viton seals containing 5% teflon for reduced friction and wear. We offer custom valve train components and full cylinder head services specializing in vintage Japanese road racing. Please contact me if you have any questions. Thanks for looking!