The M22 X Ratio is a special close ratio gear set specifically designed for the road race market. It incorporates extra close ratio ( thus x) gears making it ideal for dirt track and endurace racing. This project uses the Autogear SuperCase, M22X set, and iron mid plate. This is the "closest" of close ratio synchronized gear sets ever made for any street 4 speed. These gears use the M22 style helix angle which produces less case end loading and heat stress than normal Muncie gears. For information on ratios go our specification page.
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