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 (MAP9140). 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: We recommend that our MAP9140 valve stem oil metering seal is used on both intake, and exhaust guides for the Rocket III and the T160.