I know on Tige that have two mufflers near the transom, guys with FAE call up Larry and have him fab up a stainless straight pipe replacement (cheaper than replacement part usually). The new Nautique boats with a surf pipe have also removed the muffler. Rumor is FAE with no muffler has lower back pressure than no FAE with factory muffler.
If you do not have an FAE, it will be very loud without the muffler.
Topazsurfer with the Tige 22V has done this mod.
http://www.tigeowners.com/forum/show...haust-solution