Our Sea-Doo 260/255 Intake Manifold Upgrade Kit enables your engine to produce more horsepower through increased boost pressure (+1lb). Supplied hole saw & cutting fixture allow easy removal of restrictive screen element from inside of intake manifold. Special o-ringed, billet block-off plug fills opening left after removal of screen element. Integrated fitting allows for easy installation of Blow-Off Valves, Fuel Pressure Regulators & Boost Gauges. Includes detailed installation instructions.