These F106 spools are machined from 4140 steel, then fully heat treated and finish turned on all locating surfaces for maximum strength and precision. Designed for F106 axle applications, these spools provide a direct locker-style replacement for differential carrier assemblies.

Each spool is splined and can be configured for either 19 spline or 34 spline axle shafts, allowing compatibility with a range of F106 axle builds and drivetrain setups.

Built for extreme-duty applications, these F106 spools are designed for competition, pulling, and heavy off-road use where maximum strength and direct power transfer are required.

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