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I want to make my X run as close as possible to an R.

My bike has an FMF Factory 4 slip-on, & I just got a quiet core and spark arrestor for it. Part numbers for the Factory 4 are the same for the R and the X, so I assume the headpipes are interchangeable.

Does anyone know what years of the R headers will work?

I'm putting an R cam in it, too. Any other suggestions (other than the obvious uncorking and re-jet)?

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If you PM me or Bubba281, we can e-mail you a pdf of "The Wrench" by Honda. It has the factory competition mods to make the X run as designed (more like the R) and includes recommendations to fit R cam, R headers etc...

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