Turbosmart - Big Bubba BOV SleeperTurbosmart Big Bubba BOV Sleeper Big Bubba has been designed for big horsepower, high performance and high boost turbo and supercharger applications. Big Bubba is, as its name suggests, big, bold and in your face. It is by far the largest valve in the Turbosmart range. But it's not all about the size and looks, Big Bubba packs a lot of punch too! With a heavy duty, CNC billet aluminium body and components and a 52mm (2. 05") hard anodised aluminium