13mm Fat Boys Glue Track OD [2.7mm] Set of 4 Piston Drilling:Custom Drilled 1.7 and 1.9 The engine area remains clean

The engine area remains clean and a deep rooted position allows the engine head maximum side exposure to air and escape

Uses geniune Associated outdrives

The roof of the body remains strong with the upper fin in position for stability and tracking ability

and 2 snap cases included

Does not include MIP Bypass1 valves

13mm Fat Boys Glue Track OD [2.7mm] Set of 4 Piston Drilling:Custom Drilled 1.7 and 1.9 The engine area remains cleanPart Number: 1548 (set of 4 pistons) Get the edge on high traction racing with the newest Fat Boys piston technology. These pistons "G" for glue track OD have a 0. 1mm smaller OD for more flow around the outside. This added flow gives an in between 2 and 3 hole feel with more initial softness and less pack at low speeds in the infield to make the car less reactive. Works on glued dirt or also carpet indoor. 2. 7mm thickness allows for a unique damping