13mm Fat Boys AE Piston [2.7mm], 3x1.6 Ball Differential and Parts **This is 4 pcs: the

**This is 4 pcs: the B7 outer hub

Ordering "SET" please add which drill you'd want in the notes

Also backwards compatible for B6

2 series (all)

13mm Fat Boys AE Piston [2.7mm], 3x1.6 Ball Differential and Parts **This is 4 pcs: thePart Number: 1527 Get 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