CMI's Gen-X Headers are the true direct factory replacement for Mercury Racing HP525EFI, HP600SCi and HP700SCi engines.
These are sold as a "pair of headers". They have the welded stainless water distribution lines like the factory OEM headers.
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.