MRP Ramp Control Cartridge Version E Fox 40 Float 2016 to Present Factory Performance Elite ForksMRP Ramp Control Cartridge Version E for Fox 40 Float 2016 to Present Factory and Performance Elite Forks. Ramp control adds speed sensitive ending stroke bottom out adjustability to forks. At high shaft speeds the cartridge it mimics the addition of volume reducing spacers in the fork. At low shaft speeds it allows the fork to be more active. Adds speed sensitive ending stroke control and bottom out force adjustability Isolate and tune bottom out