Thought I would see something come on here by now about the replacement headers for the 525,600,and 700.
The new Gen-X Headers....Did they ever admit there a problem with the stock headers?

Everybody on here knows their is at a certain point with all the hydro locked engines due to the header's leaking into the cylinders..But the real answer is HELLLL no,merc will never admit to it because they would have to pay for past damaged motors..

just my o2

Guys -

We have explained this numerous times. CMI headers that are made by and sold under the CMI name are different in gage and material that the headers they make for Mercury Racing. Mercury has there own specs and material, (in my opinion) makes them cheaper for mass production and lower costs.

Tap a 500 EFI header and then do the same to CMI E-top, look the same, but the CMI is much thicker and stronger.

These headers are CMI, not Mercury designed. I expect they are to replace the Mercury headers for a reason.

Class dismissed!!!

I assume that also 496 sport tubes (considering also how cheap they are - NOT! ), made by and sold under CMO name, are good quality and won't leak?

Now instock the new Gen X 525,600,700 Headers from CMI.
http://www.cpperformance.com/p-14849...0-engines.aspx

Gen-X Headers

CMI's Gen-X Headers are a direct factory replacement for Mercury Racing HP525EFI, HP600SCi and HP700SCi engines.

The new design increases water fill keeping the headers full at all time, creating cooler temperatures, which leads to improved longevity and a little extra horsepower.

Featuring more equalized primaries for improved performance, the straight-back headers with downturn collectors work with existing tailpipes and are easy to install. Constructed of quality 316L domestic stainless steel makes for one tough header with a sleek stylish look.

yeah but them hurricane headers you guys sell look nicer beefer maybe cause I have a pair

and because jen made them