JDM Cold AIR Intake Bypass Valve Filter 2.5" Pipe Silver Prevent major engine damge with this 2.5" bypass valve filter The bypass helps resolve that problem, by having a 2nd air filters This is suitable for all 2.5" dimeter pipe where bypass valve will be necessary This secondary filter will prevent water from going into the intake causing damage to the engine Made from high quality foam element with stainless steel mesh preventing foam from getting sucked into engine