This custom axle is made of forged alloy steel for any application, length, or bearing size, then induction heat treated and magnafluxed. Comes complete with pressed-on 3.150 tapered bearings, heavy duty flange plates and competition 3 inch studs with access hole. Please specify 28 or 31 spline axles. NOTE: True-Tracs require specific axle lengths, so please call and speak to a Cobra representative for assistance.