The new CAS flow valve design prevents water getting in during tail stands, wave jumping, or all out buoy shredding. The new billet flange assembly is the premium design setup and allows use of the Blowsion billet exhaust outlet so vain riders can sanitize both sides of the rear of their watercraft. The aluminum, rubber, and injection molded construction of the Blowsion one-way valve assembly along w/ the recessed internal mounting results in a bulletproof set-up. Fits all years Super Jet, KAWI 750 and SXR 800, KAWI 650, and Polaris Octane. Each pre-assembled kit includes explicitly detailed instructions, two Blowsion molded glue able urethane bulkhead and ski flanges for leak less sealing, recessed one-way flow valve, special flex tubing (allows for off center mounting unlike straight PVC tube scupper systems) mounting epoxy and stainless fasteners.