XB4 solid axle – slipper eliminator is fantastic for stock course race since it helps you to reduce maximum rotation mass and eliminates slipper impact. Really really helps to increase acceleration as well as reduce fat of drivetrain. The XB4 solid axle – slipper eliminator set contains lightweight shaft with easy and quick change outdrive system. Set includes 72 spur gear which is a great match for stock class. Option 69 spur gear can be acquired for fine gearing modification.