The stock head with stock cams can easily make 600 rwhp with no further modifications and the right turbo. Of course there are options like porting and larger valves, and even turbo cams, if you are so inclined. But this bike will make more hp than it could ever hope to put to the ground with the stock components, so no, there are no other head mods needed or necessary for what we are doing here on this build. . .Any other head mods needed?
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