Our 40 Spline Axle Shafts are engineered for extreme-duty off-road and competition applications. Manufactured from premium 4340 chromoly alloy, these heavy-duty double splined shafts are designed to withstand the abuse of rock bouncers, mud trucks, Ultra4 cars, and high-horsepower fabricated axle builds.

Each shaft is precision machined, heat treated, and black oxide coated entirely in-house to ensure maximum strength, durability, and long-term reliability in severe off-road environments. Built to your required length and configuration, these shafts are compatible with drive slugs or drive flanges for versatile installation across a wide range of custom axle setups.

Ideal for fabricated axle housings, full-float rear ends, and competition drivetrains, these 40 spline axle shafts are designed for builders looking to eliminate weak factory components in extreme-use applications.

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