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Thread: 243 heads w dual valve springs

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  1. 03-08-2012 03:06 PM #1
    kbomhower
    kbomhower is offline Senior Member
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    what is the difference in a 243 vs 317 head??? im looking to upgrade mine jw what are better for a 6.0??
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  2. 03-09-2012 07:47 PM #2
    FL_Cracker
    FL_Cracker is offline Member
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    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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