Sure I got what Ya need !!!
Call Northwest filter at 877-633-7100
Order 4 of part number P105533 Elbows
Order 4 of part number P148343 Clamps
I ordered them for my 36 Outlaw. They do work at helping to reduce the sound level but unfortunately I have a high freeboard boat and they do not go below the water. I would need to add extensions to make that happen.
If needed I can measure them out tonight and tell you how far they do go down.