Re: Camshaft upgrade question ?
I don't think you will find what you are hoping for in this style of motor. No one has had any significant gains in HP, but a significant loss of modding $$$$$ that could have been spent on real HP.... And that has been on the MB side, not the XF side. Talk to someone like Rudy Compart before you go that direction. Not those who would sell you those cams.