2000 Series Aftermarket SpeedBrake Kit For Mooney M20 Series, STC SA4342NM. Available for both 12 or 24 volt aircraft. Kit will arrive complete with STC, cockpit switch, all installation hardware and documentation. Average installation time is 25-35 hours with an installed weight of 9 pounds. STC'd For: M20 Series Mooney Features Deployable at any speed below Vne (175 Knot limit if you have tip tanks) Doubles aircraft drag Doubles normal rate of descent Helps prevent engine shock cooling Improves aircraft value and utility