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Chevy/GMC Duramax 04.5-05 LLY Discussion of Chevy and GMC Trucks with LLY Duramax Turbo Diesel Engines

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Does anybody know the difference between ARP2000 head studs and the custom age head studs? Is there a big enough difference to justify the cost difference?... JOIN NOW TO REMOVE TRACER

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Old 03-11-2013, 05:42 AM
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Does anybody know the difference between ARP2000 head studs and the custom age head studs? Is there a big enough difference to justify the cost difference?

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Old 04-01-2013, 06:49 PM
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ARP2000 Head Studs are 220,000 psi tensile strength

ARP custom Age Head Studs are 260,000 psi tensile strength. (For higher HP)

And price is the other difference

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Old 05-02-2013, 01:40 PM
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Have to tap the block for the bigger studs I'm pretty sure.

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Old 05-02-2013, 02:34 PM
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Theyre not bigger just different material. If you have an unlimited budget the customs will add some extra insurance but, Ive seen the regular 625's hold up just fine in compound setups and other various high horsepower applications.
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Old 05-03-2013, 01:24 AM
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Originally Posted by Duramax_lly View Post
Have to tap the block for the bigger studs I'm pretty sure.
I believe your are just chasing the bottom few threads to take advantage of them. This would be done with a bottom tap as GM uses a taper tap and the last few are not complete

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