Triumph 650/750 Up to 1978 T140E 1979 - Valve Guides Intake/Exhaust

A Proprietary Alloy as Designed for and used exclusively for NASCAR team is now available for your beloved British bike.  Under exclusive arrangement with the manufacturer,  MAP Cycle is proud to offer this material to our customers.  NASCAR '45'^TM is 675 Manganese bronze alloyed with other elements to form a long linear vertical grain structure making our unique valve guide that gives the highest amount of heat dissipation along with longest life.

• Helps eliminate pitting on seats and/or valve faces


• Superior durability


• CNC machined to exact specifications


• Better heat dissipation compared to even AMCO 45


• Expansion rate similar to aluminum (perfect for aluminum cylinder heads)


• Honed internal finish for best oil retention


• Proven in Racing and on the street by enthusiasts across the globe

Exclusive Ringed Margins

No longer require different guides for sealed/unsealed applications. Remove a small bit of material and add our high temp Viton oil metering seal (MAP9240). A true cost saver as No additional guides are needed if you happen to decide on using seals.

Constant research and development

M.A.P. NASCAR '45'^TM valves guides are the absolute best guides available for street or track.  Etched with type and size for ease in identification.  Insist your dealer carry the very best British valve guide.  To be sure of the highest quality possible remember to ask for them by name - Nascar '45'^TM

NOTE: When used as a 650/750 Norton Commando Exhaust guide, ID must be honed to fit.