Thru-hull exhaust tip lengths
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Thru-hull exhaust tip lengths

  1. #1
    Pie Wagon Newbomb Turk's Avatar
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    Default Thru-hull exhaust tip lengths

    Does anyone have a clue what the difference is to running long thru-hull tips ( 8-10") VS maybe (2-4") tips? Is there any difference other than the tone changes? Is there a advantage to running one vs the other?
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  3. #2
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    I would think the diameter would have more to do with the tone than length. I am assuming you are saying the inboard length of the tip, since there is only a few inches, maybe 6' max, outboard of the transom? Im gonna make a set of 3.5" slashcuts and open up my logs from 2 7/8 to 3.5. I am thinking the diameter increase will make a deeper sound rather than length differences affecting things very much. Could be totally wrong though. If you are making a set, you could put the flange close to one end and make the overall length rather long, then install them with the short side inboard and see how it sounds, then flip it around and install it short side outboard, and see if it sounds different. You would need some differnet lengths of hose for each setup but Im curious what the result would be.

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    Slim, thanks for responding. I'm going from logs thru-hull with 3" short "outside" tips with flapper to thru-hull headers with 4" collectors and 4" thru-hull tips. The 3" dia tips I have stick past transom maybe three inches. The new header system has big 4" dia chrome slash cut tips about 10-12" long. Not sure I like the length of the 4" tips, thinking about cutting them back to 3" and install outer rubber flaps like I had originally. My concerns are what is hanging out of the transom, if anyone knows weather or not if there is a benefit long or short? I know this is pretty insignificant to have concern with but figure the Guru's out there would know.
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    Boat Nut sleekcrafter's Avatar
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    Longer tips generaly reduce exhaust residue on the transom, and allow for insert mufflers if desired.
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    Quote Originally Posted by sleekcrafter View Post
    Longer tips generaly reduce exhaust residue on the transom, and allow for insert mufflers if desired.
    Yeah, that certainly makes sense. No muffs. my mouse motor isn't loud enough for those yet. :) I do like the idea of cutting down on exhaust scum.
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    i went with center rise and TT piping. this will allow me to run a 4" silencer that slides up into the exhaust if i ever need it to be quiet for certain lakes/harbors.

    just something to think about...



    dont mind how long they are out the back. they were trimmed shortly after.

    4" Hi-Performance Silencer For Water Injected Headers

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