The result of many months’ of development work, PRORAM air filters feature a Twin-Tangential Velocity Stack, designed to optimise air flow. This unique design has been proved to flow more air with less turbulence, which in turn can offer performance gains – especially with a tuned vehicle. The Velocity filter range has been designed to be as versatile as possible, this means all the filters can be used with any Velocity stack to achieve the correct neck diameter needed for your application!