- Description
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Details
Must hone after fitment. "Hone To Fit"
Exclusive NASCAR '45'TM Material
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 a proprietary Manganese bronze based alloy that (unlike its Ampco 45/C630 nickel loaded brothers) forms a long linear vertical grain structure for superior wear with an expansion rate similar to aluminum. This similar expansion and highest amount of heat dissipation allows for a tighter valve to guide clearance for not only longer life but also a more stable and accurate valve seating.
- Helps eliminate pitting on seats and/or valve faces
- Superior durability
- CNC machined to exact specifications
- Better heat dissipation compared to the popular AMCO 45/C630 materials
- 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 quailty possible remember to ask for them by name - Nascar '45'TM
NOTE: When used as a 750 Norton Commando Exhaust guide, ID must be honed to fit.Additional Information
SKU MAP9103 Manufacture MAP Cycle Country of Manufacture United States - Additional Information
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Additional Information
SKU MAP9103 Manufacture MAP Cycle Country of Manufacture United States - Reviews
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- Fitment Information
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Norton Models
- Norton Atlas 745 1963 - 1967
- Norton Atlas Scrambler 1964
- Norton Commando Fastback 750 1969
- Norton Commando Hi-Rider 750 1973 - 1975
- Norton Commando Production Racer 750 1973
- Norton Commando Roadster 750 1972 - 1973
- Norton Commando Scrambler 750 1971
- Norton Dominator Model 77 1957 - 1958
- Norton Dominator Model 88 1952 - 1962
- Norton Dominator Model 88 Deluxe 1960 - 1962
- Norton Dominator Model 88 SS 1961 - 1963
- Norton Dominator Model 99 1957 - 1962
- Norton Dominator Model 99 Deluxe 1960 - 1962
- Norton Dominator Model 99 SS 1961 - 1962
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Product Questions
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