Shifnoid’s CO2 shifter kit works with 3 Speed Reverse Shift pattern for B&M Pro Rachet. Simple circuit prevents accidental activation from park or neutral into gear. Includes solenoid, CO2 cylinder, airline, fittings, safety switch, handle attachments, bracket and relay. Shifter & RPM Activator not included.

People who buy this part also buy a Bottle Kit (Bottle, guages, line, and fittings)
and an RPM Activator Switch

and a Bottle mount clamp:
Polished Aluminum Roll Bar Mount Clamp