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Thread: 243 heads w dual valve springs

  1. #11
    Join Date
    Nov 2011
    Location
    NH
    Posts
    109
    what is the difference in a 243 vs 317 head??? im looking to upgrade mine jw what are better for a 6.0??

  2. #12
    bump!! $600 and ill pay half shipping.

  3. #13
    Quote Originally Posted by kbomhower View Post
    what is the difference in a 243 vs 317 head??? im looking to upgrade mine jw what are better for a 6.0??
    Higher compression. Good for a few extra hp or great starting point for a high hp build. I had these on my 6.0 made a big diff in performance and my truck sounded better. Im going supercharged so these are no good for me anymore.
    Last edited by FL_Cracker; 03-09-2012 at 07:52 PM.

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