Requires Burris Adaptor Plate for Specific Engine
American Rail Frame Width, Includes Clamps
Fits 1 1/8 to 1 1/4" (28mm to 32mm)
Angled Slider Mount Only
What is the difference between International and American Rail?
The distance center to center between the two engine rails.
International Measures 3 5/8" and American Measures 3".
Almost all race karts are International whether they are made in the US or not.