The body is made from a high density nylon (plastic) fiber with a steel rack. Often called a high speed piston, a small amount of plastic is missing from each side to lighten the weight. The second tooth is fully missing allowing for the AOE to be corrected. Identical to the SHS version apart from the colour of the rack.
- Colour blue
- To increase the pistons strength it's advisable to superglue the rack in place along it's guide-rails and at both ends.
- This piston has shorter guide rails which can catch on gearboxes with only partial piston rails. If you have one of these gearboxes you may want to consider using a piston with no rail gaps such as the 14.5 or the 15 tooth.
- Rack colour is silver