Upgrading 4.6 DOHC Cams - Supporting Mods to Protect Your 4V Cobra, Mach 1, or Marauder Engine!

Upgrading cams on your 4.6 DOHC engine isn't the easiest. But often overlooked are the supporting mods required to protect your 4V engine. Supporting mods include upgrading the valve springs, valve retainers, pivot pins, secondary chains, and adding adjustable billet timing gears along with the Cobra Engineering secondary chain fix to tie it all together.
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