The Strange Ultra gear case kit includes the 3.250" carrier bearing aluminum gear case, billet aluminum big bearing pinion support that accepts 35 spline pinion gears only, carrier bearing & races, pinion bearing & races, pinion bearing solid spacer kit, pinion support bolts & washers, pinion depth shim kit, pinion support o-ring, pocket bearing & heavy duty retainer kit, 20 ring gear bolts & washers, pinion seal and pinion nut. NOTES: add CE-4028AU1 pinion spacer when using 10" gears.