Water Jacketed Tailpipes

[cj222]

Just finished building these for a customer's 21ft Howard. He picked up a used pair of CMI headers for his boat and wanted to move the exhaust exit above the swim step. These are 5" x 4.5" at the v-band flange reduced down to 4.5" x 4" at the transom. Had my buddy laser cut some stainless blanks to block off the old exhaust holes. Had everything polished and the headers re-polished.

 

[old rigger]

damn

 

[Todd Mohr]

Looks incredible!!

 

[cj222]

Looks incredible!!

Thank you!

 

[SpectraPat]

Man, those came out sweet. Pretty sure I’m going to have you make a pair for my spectra 20

 

[cj222]

Thanks bud one day I'll get your boat over here

 

[mattyc]

Just finished building these for a customer's 21ft Howard. He picked up a used pair of CMI headers for his boat and wanted to move the exhaust exit above the swim step. These are 5" x 4.5" at the v-band flange reduced down to 4.5" x 4" at the transom. Had my buddy laser cut some stainless blanks to block off the old exhaust holes. Had everything polished and the headers re-polished. View attachment 1349607 View attachment 1349609 View attachment 1349610 View attachment 1349611 View attachment 1349612 View attachment 1349613 View attachment 1349614 View attachment 1349615 View attachment 1349616 View attachment 1349617 View attachment 1349618 View attachment 1349619 View attachment 1349620 View attachment 1349621 View attachment 1349622 View attachment 1349623 View attachment 1349624 View attachment 1349625 View attachment 1349626 View attachment 1349627 View attachment 1349628 View attachment 1349629 View attachment 1349630

Nice work! Have you done jacketed exhaust before? The v band flange, is that something you buy or did you make that as well?

 

[cj222]

Nice work! Have you done jacketed exhaust before? The v band flange, is that something you buy or did you make that as well?

Thank you! Yes I have been doing water jacketed tailpipes for several years. These CMI headers came with the v-band flange setup. We purchased the mating flange to build off of from CMI as well as the clamps.

 

[counterpart7]

Probably a stupid question…

Where exactly does the water go from jacketed to entering the exhaust?

 

[cj222]

Probably a stupid question…

Where exactly does the water go from jacketed to entering the exhaust?

The water enters the exhaust internally just before the rubber hose coupler connection at the tips

 

[Nanu/Nanu]

Gosh dang it! Those look good!

 

[AZLineman]

Perfect

 

[cj222]

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