What, if any, impact would occur upon switching out the stock muffled tips to non muffled tips? I'm looking for improved sound w/o the need for any further mods and voiding of warranty. TIA.
Also, looking for a suggestion for new tips w/ internal flaps.

Check out Eddie Marine tips 100-12.
Jay

You may pick up a mile per hour or so without the mufflers. Make sure to get SS internal flappers.

i put stainless marine tip's on and it sound almost like my 525's did . now it sounds like a performance boat

I've always been a fan of the Corsa angle-cut tips with no baffles. They have a stainless, no-rattle/no-burn flap in them. Nice piece.

My Corsa's rattled a lot at idle, but they were a quality piece.

Looks like a good product. Will this mod require any recalibrations?

No, but the screw holes are opposite from the stock tips so you have to fill the existing screw holes and re-drill the new ones. The old tips maybe a PITA to get off. Be careful not to gouge the gelcoat when trying to remove them.
Jay

Thanks for all the info.