Valve Guide Set Bronze Triumph TR4 from CT21471 to TR4A

This a is a Manganese Silicon Bronze Valve Guide Set (8) for the Triumph TR4 from CT21471 Triumph TR4A. These valve guides have a height of 2.0625 inches with a stem size of 5/16 and a diameter of .500 inches. Why choose a Manganese Silicon Bronze Valve guide; The Bronze has the amazing ability to self lubricate plus the Bronze provides superior heat transfer and resists seizing compared to standard Cast Iron Valve Guides. Rebuild your Cylinder Head once with High Quality Manganese Bronze Valve Guide.