Text Box 13B/20B Mazda Rotary Engine Billet Main Gears . Manufactured here in the US as a replacement for the NA 20B center and upgrade Front and Rear units. Gears are manufactured using Pre Heat treated 4140/50 Stock, thus making these reproduction units 50% stronger than OEM Mazda Old Stat Gears. All the benefits of direct fitment with a much stronger harder material used. With great feed back from the 20B center gears , 13B 20B front and rear Billet 4140/50 gears are completed and ready to ship Today! Note. Gears are sold with OUT , New Bearings and set pins. Items can be added to the order per customers request. Text Box |
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