13mm Fat Boys AE Piston [2.7mm], 2x2.0 Ball Differential and Parts made in Covina

made in Covina

Pistons are marked H for High Flow hole

while the larger diameter hole allows for smoother diff action without the thrust dragging on the diff screw

2 series (all)

We've also found the best bearings to run on the axles

13mm Fat Boys AE Piston [2.7mm], 2x2.0 Ball Differential and Parts made in CovinaGet the edge on high traction racing with the newest Fat Boys piston technology. 2. 7mm thickness allows for a unique damping effect that is a huge benefit on high traction. The added thickness and square edge Schelle design limits blow by, so the oil is forced through the holes. The added length of hole on the damping valve gives more pack on fast hits all of this shines on high traction where you get more predictable cornering, and less abrupt body