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

With years of competition testing and more top place finishes than we can count

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

the 4" Pro Series Housing is as versatile as it is tough

Right Hand: (12) twelve 1"-14 RH x 1

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