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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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  #1  
Old 03-11-2013, 05:42 AM
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Default head bolts/studs

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?

fireman-1781's Sig:2005 Gmc Sierra SLT Crewcab 4x4 , S&B coldair intake 6" Fabtect lift with 35 12.50 cooper stt tires.
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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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  #3  
Old 05-02-2013, 01:40 PM
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Have to tap the block for the bigger studs I'm pretty sure.

Duramax_lly's Sig:2005 lly ccsb, ppe up pipes/manifolds, 165 gph lift pump, built trans, head studs, front end built, nitrous, 5" intake with Lbz mouth piece, fuel rail plug, ported rail, 68 mm turbo from Danville, custom traction bars by me, efilive tunes by me!
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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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  #5  
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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