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243 or 317s?

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Old 09-06-2010, 05:44 PM
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ok im a lil confused about what i need to buy right now. Theres 2 sets of heads im looking into for my 98 Z28 and i feel dumb but im curious as to which one would b better for my application? Both are ported and polished and look to b in great condition and are running about the same cost for each.. So help
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Old 09-06-2010, 06:11 PM
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Old 09-06-2010, 06:14 PM
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They are the same heads 317=243.

317=6.0 head, 243=LS6 head

Flow should be identical, the stock valves can be different.
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Old 09-06-2010, 06:26 PM
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sooo in your opinion which one do you consider a better buy? the 317's or the 243s?
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Old 09-06-2010, 06:27 PM
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Old 09-06-2010, 06:28 PM
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Old 09-06-2010, 06:28 PM
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Old 09-06-2010, 06:29 PM
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Old 09-06-2010, 06:29 PM
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Old 09-06-2010, 06:29 PM
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Old 09-06-2010, 06:30 PM
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half way there... ugh i need to be able to post on classifieds lol
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Old 09-06-2010, 06:30 PM
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Old 09-06-2010, 06:30 PM
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Old 09-06-2010, 06:31 PM
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Originally Posted by chavez885
They are the same heads 317=243.

317=6.0 head, 243=LS6 head

Flow should be identical, the stock valves can be different.
Aren't the chambers larger on the 317s too?
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Old 09-06-2010, 06:31 PM
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Old 09-06-2010, 06:32 PM
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317's are better for fi setups...almost the same head though.
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Old 09-06-2010, 06:32 PM
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oh i am not to certain about that but the guy i was talkin to was saying... the same cars with 243's would get beat by him
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Old 09-06-2010, 06:34 PM
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well i do plan on eventually putting a procharger on this bad boy so... guess this is a step in the right direction
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Old 09-06-2010, 06:34 PM
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Old 09-06-2010, 06:34 PM
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