The front mounted exhaust helps to keep the exhaust from entering the pump while the ski is vertical in the water not really a necessary mod IMO.
The check valve if you are talking about the scupper system is a one way check valve inside the tray installed in 2” PVC that connects the engine...
Check in your area for a water jet it is really cheap and quick to have material cut, that’s about a 2 minute part to cut and 5 minutes to draw. There are a lot of cad monkeys on this site that would probably draw it for you.
Mark44
Just turf the top of the rail by the hood this is all you need IMO. If you want to sell the stock rub rails let me know I need to put some on my ski.
Mark44
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