5.9 head bolts November 24, 2012 10:25AM
What other recomendations are there for head bolts or studs for a 5.9 cummins, at 3000 rpm and 40 psi boost? low buget puller, just checking options as ARP studs are kinda pricey.
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Re: 5.9 head bolts November 24, 2012 12:27PM
Nothing wrong with the stock head bolts ive ran the same set 3 years 50 to 60 pounds of boost up to 5400 rpms.And ive never blew a headgasket i would recomend firerings in the block that dont cost much
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Re: 5.9 head bolts November 24, 2012 12:45PM
The prior comments i made was on a alcohol turbo eng llss it might not work for a diesle
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Re: 5.9 head bolts November 25, 2012 02:30AM
I had a set made for a motor . 600.00 for 5/8" x 8" from extreme studs there listed in the directory
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Re: 5.9 head bolts November 25, 2012 05:30AM
is a marine gasket any better than stock or fire rings?
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Re: 5.9 head bolts November 25, 2012 03:25AM
With your goals stock head bolts should be fine. Most guys can get 40-45psi with stock head bolts.

Stock head bolts will not work with fire rings. They do not have enough strength to properly crush the fire ring. Same goes for ARP 2000s.

Extreme-studs is the most cost effective option at this time for someone going beyond what stock bolts or the lesser of the ARPs.
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Re: 5.9 head bolts November 25, 2012 01:23PM
Mine has stock bolts with firerings hx 60 turbo 50 to 60 psi boost depending on good or bad track 18 fuel injecters big valves ported head ross pistons 285 dur cam stock rods stock rod and main bolts 120 hooks and has never blew a GASKET head bolts ar toruqed to 110 mains are 130 rods 70 you cant make me bellieve it wont work And i wish my fire rings wasnt crushed Then I wouldnt have to buy another set spend your monney somewere else
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Re: 5.9 head bolts November 25, 2012 03:36AM
A1 Technologies

Available through Haisley Machine.

These are what I use for head and main studs on almost all of our builds.
I've never had a fastener from them fail.


Chris Watson
Watson Motorsports
Batavia, OH
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Re: 5.9 head bolts November 26, 2012 05:19AM
Bob, I think you'll end up with more than 40 psi boost! lol!
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