Here you will find valves for your KEEWAY, CPI ... that you just want slats or full flaps or even a box has flaps, you'll find everything you need. Depending on the system, you can use a carbon thickness: -0,25mm (for engines that use torque and low speeds). -0,30mm (For engines that use standard diets high enough). -0,35mm (Ideal for high speeds, the motors that are loud and high in turns). -0,40mm (For ultra sharp motors ... Who does that speak up and who go to extreme diets).