Easy to install catch can/oil breather eliminates power-robbing crankcase fumes and oil vapor from your engine's air intake. Increases horsepower by removing the engine's requirement to burn relaitvely non-combustable oil. Also improves intercooler efficiency by preventing the oil sludge coating that lowers thermal efficiency. Excess oil vapor is routed to our translucent catch can where it condenses and collects for occasional draining via integrated petcock valve. Kit includes K&N breather and Sea-Doo mounting bracket along with all neccesary hardware & installation instructions. Please note that our current Sea-Doo 4-TEC Catch Can/Engine Breather Upgrade Kit (part# RS19050-BCC) does not work with iS & aS suspension deck models.