A "must-have" upgrade, if running your supercharged ski at wide-open throttle for extended periods, but more so when racing the bouy course. Fixes directly to the forward engine lifting lug, with a single lock nut & washer, making a very easy installation. [Wiring harness ties should be temporarily cut away, to allow room for your hands and/or tools] Captures crankcase oil blow-by mist, that would otherwise be drawn into the OEM air intake system, clogging vital components, such as intercooler and the intake manifold. The kit includes all components required for installation. [Route the hose to your liking.....a silicone blanking cap is provided, for blocking off the OEM scavenge port. *UPDATE: 1) This unit now has a revised [shortened] "adaptor bracket" to also fit the new generation '21 onwards models onward. 2) Vent port is increased to Ø19mm, for the high quality breather filter.