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TFS Genx 255 ls3 vs Mast ls3 med bore

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Old 08-16-2013, 07:59 PM
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Default TFS Genx 255 ls3 vs Mast ls3 med bore

Who would win the battle between these two heads?

They both accept stock rockers and come with billet stands.

Both are similar in pricing with the trickflows being a little cheaper.

These are going on a 370 motor with billet 80mm and holley ls3 hi ram.

Anybody running these heads?
Old 08-17-2013, 01:45 AM
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This should be a good thread. I'd like to throw the PRC 260cc heads in for comparisons sake also. Like to see all motor and boosted info.
Old 08-17-2013, 10:50 AM
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I agree, throw in some PRC 260 and we have a 4" + shootout!
Old 08-17-2013, 12:00 PM
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Agree! The ls3 prc 260's come in 4 bolt? I only see 6 bolt for that particular head
Old 08-17-2013, 12:08 PM
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Originally Posted by slowlsx
Agree! The ls3 prc 260's come in 4 bolt? I only see 6 bolt for that particular head
the prc's are 6 bolt but the TFS/Mast have a 6 bolt option. 4 vs 6 isnt gonna change the flow characteristics
Old 08-17-2013, 01:07 PM
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Originally Posted by Camper
the prc's are 6 bolt but the TFS/Mast have a 6 bolt option. 4 vs 6 isnt gonna change the flow characteristics
True, I was more along the lines of asking can I put a 6 bolt head on a 4 bolt block? Or do they make a 4 bolt option?
Old 08-17-2013, 02:41 PM
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You can put a 6-Bolt head on a 4-Bolt block yes.
Old 08-17-2013, 03:59 PM
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I have the 6 bolt PRC 260 heads on a 4 bolt LS3 block making just over 1k to the wheels.
Old 08-17-2013, 04:40 PM
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Originally Posted by blake b
I have the 6 bolt PRC 260 heads on a 4 bolt LS3 block making just over 1k to the wheels.
Combo? Dyno graph? Timeslips?
Old 08-17-2013, 04:44 PM
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Out of all three of those heads, the trickflows seem the most apealing to me! Im sure PRC sells great heads bit they are not on the map like TFS nor have they set as many records as them.



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