The best modification for a Super Cub - the VG's lowers stall speed, increases aileron control and more.  Tail strakes virtually eliminate spins.  Check out our website for a video showing Super Cubs flying with our Vortex Generators.  You'll want this kit for your aircraft! (http://www.cubcrafters.com/video).  Includes STC, template, installation instructions, drawings, Vortex generators, hardware, tail stakes....everything you need to install this great kit!