Offshoreonly.com

Offshoreonly.com (https://www.offshoreonly.com/forums/)
-   General Boating Discussion (https://www.offshoreonly.com/forums/general-boating-discussion-51/)
-   -   EXHAUST (which one) (https://www.offshoreonly.com/forums/general-boating-discussion/183739-exhaust-one.html)

jdub 04-04-2008 10:11 PM

Go with the SM's. Cast aluminum will last longer than the welded stainless tube. Just check the difference on the warranties, pretty clear in my opinion.

Lofty 04-05-2008 11:21 AM

Both are nice products but I am a big fan of headers over cast. If they are flushed and properly cared for they won't rot out. From a maintainance standpoint headers are easier to deal with, you can actually SEE you spark plugs.

I would be concerned with fit regardless of whos headers you pic. If you run tails they may not mate with your existing exhaust holes in the transom. Can CMI custom bend your tails or are you buying off the shelf. Off the shelf parts rarely fit they way you think they might.

Companies like Lightning and Stelling will ask for measurements before you buy. I know CMI will make tails to suit but it's an up-charge.

handfulz28 04-05-2008 01:20 PM


Originally Posted by Boomer35 (Post 2513690)
is it not funny i can get 7000 opinions on a guy that may or may not have repoed a boat,

i can get another 1,000,000 opinions about a change in OSO ownership,

but i cant get any REAL advise on which Exhaust to use other than a sales pitch!!!!!

OSO at its best

That wouldn't be because there's already been 1,000,000 threads on this topic already would it?

tomtbone1993 04-05-2008 01:27 PM


Originally Posted by handfulz28 (Post 2514127)
That wouldn't be because there's already been 1,000,000 threads on this topic already would it?

BINGO WE HAVE A WINNER:cool-smiley-011::cool-smiley-011:

tomtbone1993 04-05-2008 01:32 PM

1 Attachment(s)

Originally Posted by Pantera28-650HP (Post 2514131)
I didnt give you a sales pitch.

Mercury Racing, Ilmor and every world record and championship team runs CMI headers. I dont need to pitch them.

Email me at [email protected] about the brackets you need and send me your address. We pick our headers up at CMI, the other guys need to have them shipped in, that adds $$.

It has to be a true Bravo layout for standard tails to fit. If its a true Bravo layout, I'd go with Unitops. I wont post the price here as thats how the "other" guys met my price.

THE CMI ON MY 540'S SOUND GREAT:cool-smiley-011:

Stormrider 04-05-2008 01:32 PM

SM, 5yr warranty... nuff said.

Donman 04-06-2008 10:26 AM

I have aset of SM Hi-Torques now and had a set of Gen III on previous boat. You simply cannot beat the fit, finish and overall quality. Good customer service as well. Cast aluminum will last longer, no question. I think the horsepower gains will be quite similar.

jdub 04-06-2008 11:14 AM

I agree Donman. It's not that the cast aluminum will out last the stainless because of corrosion. I think it has to do with the welds in the stainless tube that leak due to the constant contraction from thermal growth (hot/cold...hot/cold).

formula 382 sr-1 04-06-2008 11:52 AM

There are two types of CMI'S, The one's that are leaking and the one's that are going to leak. Stainless Marine:D


All times are GMT -5. The time now is 06:30 PM.


Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.