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-   -   650HP NA exhaust question. (https://www.offshoreonly.com/forums/general-q/363596-650hp-na-exhaust-question.html)

Ryan00TJ 11-02-2019 07:56 AM


Originally Posted by Panther (Post 4713077)
Lot of good information here.

On the original post where CMI's were mentioned, were you looking at full-length CMI's or E-Tops? If you were considering E-tops I would point you in a different direction and over to the Stainless Marine Gen II's. Minimal power difference from the E-top to the Gen II and a LOT more longevity. I've seen too many tailpipe failures over the years with EMI's. You can also get the SM taippipes stepped to full 4 1/2" if you want to make a little extra power.

If you're talking full-length headers, go with Diamon's Thunder n Lightning hands down. CMI's are too leak/failure prone from my experience. They look great but 7-10 yrs from now you could be chasing issues.

I have customers, myself included, with all of the above listed exhaust systems and by far everyone has been most satisfied with Stainless Marine II / III and Thunder n Lightning.

You can't beat the TnL exhaust for your power level at that $2900 price!! The CMI sporttubes are over $7K. Invest that savings into a set of cylinder heads for your build.


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