This a is a Manganese Silicon Bronze Valve Guide Set (8) for the Triumph TR4 from CT21471 to TR4A and Triumph Spitfire 1967 to 1980 and MG Midget 1500. 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 Silicon Bronze Valve Guide.
