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Half-tooth pistons are REQUIRED for use with these gear sets:
- SystemA Infinite Torque Up
- SystemA Ultra Torque Up
- SystemA Super Torque Up (Helical, old style - new style uses regular piston)
- Prometheus MAX Torque
You can use helical pistons with other gear sets as well, but are not required and provide zero benefit. If anything, you'll have reduced contact area, stress is now focused/concentrated on to a smaller tooth area.
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