Upgrade your current GT piston to the R piston spec.
Adjust brake stroke precisely from 15 mm to 45 mm.
The kit to upgrade V3 2-pedal sets to V5.
Bring older 2-pedal sets to current V5 spec.
The kit to upgrade V3 3-pedal sets to V5.
Bring older 3-pedal sets to current V5 spec.