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What about the Stainless Marine gen.3 BB manifolds for a 525 application ??
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The top gun we purchased this summer has Hardin marine headers on 525's. They are 2 yrs old, I am rebuilding top ends this winter they have 450hrs on them. I will have the headers pressure tested to make sure they are ok. My mechanics talk nothing but good things about the Hardin marine headers.
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I have 2 sets off 2011 700's with 34 hours. 6k for both sets. like new
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[QUOTE=39 Unlimited;4030300]
Originally Posted by neva satisfied
(Post 4030012)
This might help. These are 2011 CMI's Thanks! |
[QUOTE=PARADOX;4030380]
Originally Posted by neva satisfied
(Post 4030012)
THe old.. old... style had double tubes all the way to the flange. Then the co. was sold, changed to the "cool collar" and then the Gen X came out, ALSO with the cool collar design. Prior to the Gen X the collar was the same as the Gen x as shown on the pic. CMI does make a military header, no "cool collar" bs. That's the way to go if you can get a set. |
I've had the old style and the new style CMI's and have problems with both on 525 motors. I forget the number of sets I've gone through. On the next boat I used Stainless Marine and they've worked for me. I won't buy any more CMI's.
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Originally Posted by HyFive578
(Post 4030298)
Will they attach easily to a 525/600/700 engine or are modifications required?
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Originally Posted by tim mccray
(Post 4030618)
I've had the old style and the new style CMI's and have problems with both on 525 motors. I forget the number of sets I've gone through. On the next boat I used Stainless Marine and they've worked for me. I won't buy any more CMI's.
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Originally Posted by gnorthga
(Post 4030153)
Thank you for your 2-cents chad but cool is not my goal.
Reliable and making it to all stops is the plan. Money is not a problem getting educated and sharing imformation is were I am coming from so I only do this once not two or three times. It's just a simple rule of physics and basic metalurgy... Heat, cycling, flex, constant differences in temperature, welds, tubes, bends, collectors, bungs, more welds....... It WILL happen to any header over time. It's just my opinion but everyone gets focused on the bling... Even Mercury finally went with a manifold design on their new turbo engines... Stainless Marine went into the business of manifolds because they started out as a stainless header company. I applaud them! |
Just call Hardin Marine as they have a direct replacement for these headers but they are made in a better material than the CMI's are and they are far superior.
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