Spidertrax 40 Spline Ultimate Unit Bearing 6 on 6-1/2" x 5/8" Studs Side:1RH&1LH For those wondering why the

For those wondering why the 300M versions of these shafts are more expensive then the 4340 counterparts

Engineered and developed specifically for racers and enthusiasts alike

Spacers/Washers: (48) MCW-16 zinc plated steel spacers

Yukon heavy duty pinion supports feature upgraded materials and a larger design than OEM to provide heavy duty strength in racing and off-road applications

Spidertrax 40 Spline Ultimate Unit Bearing 6 on 6-1/2" x 5/8" Studs Side:1RH&1LH For those wondering why theUltimate Unit Bearing 40 Spline 6 on 6 1 2" x 5 8" Studs Built ground up for Ultra4 rock racers, the Spidertrax Ultimate Unit Bearing is truly the reinvention of the unit bearing itself. Genuine Timken bearings, full chromoly heat treated construction, left & right hand threaded spindle nuts, and a fully integrated drive slug makes the Ultimate Unit Bearing the only racing unit bearing of its kind. The Ultimate Unit Bearing, the last bearing you'll