Need heads
Senior Member
Joined: Aug 2008
Posts: 4,778
Likes: 10
From: Douglasville GA
Depends on what engine you have. With 4.6's, you can swap in a set of Cobra 4 valve heads and the supercharger. The 5.4's can get 4 valve Navigator heads plus the ridiculous looking intake manifold.
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Member
Joined: May 2009
Posts: 61
Likes: 0
I have a 5.4 but the thing is I already have a supercharger.. I know mmr has some and ford racing make some too.. but I was wondering if anyone is using some good ones that really helped perfomance wise.