XB4 solid axle – slipper eliminator is ideal for stock class racing since it helps to reduce maximum rotation mass and eliminates slipper impact. Really helps to increase acceleration and also to reduce weight of drivetrain. The XB4 solid axle – slipper eliminator set includes lightweight shaft with easy and quick change outdrive system. Set includes 72 spur gear which will be a great match for stock class. Option 69 spur gear can be acquired for fine gearing modification.