These 20-145 spools are machined from 4140 steel, splined, heat treated and then finish turned on all locating surfaces for maximum precision and durability.

These spools are typically splined for 2 1/16” 32 spline axle shafts, with additional spline configurations available upon request to accommodate custom drivetrain setups.

This item is proudly designed, engineered, and manufactured in house at IMS.