Highest Quality Hardened Steel gear set for the Baja. These gears are the best in the business. Designed to hold up to the punishment of big HP engines. **. Please note.  These are solid gear sets.  Blackbone manufactures solid gear sets for the larger sizes.  24-50 and up.  Smaller gear sizes require the use of a spur gear carrier and are sold under the Low Ratio baja gear section.  These solid gear sets do not work with BBRC two speeds.