A1 headstuds

[Onefastcr]

They have 1000 miles on them and one torque and one check. 375$
Can text pics.

 

[xDiesel03]

A1 H11s?

 

[Broaner]

Guessing standard A1's?

 

[Onefastcr]

I'm not sure. Only thought A1 offered one type of stud for cr. Any way to tell? I've ran multiple 90 psi passes at the track and never had a head lifting problem.

 

[Broaner]

Seems like there are regulars and H11's.

http://www.dieselpowerproducts.com/p-9625-a1-technologies-h-11-head-studs-985-12-59l-67l-cummins.aspx
http://www.thoroughbreddiesel.com/A1-technologies/5.9l-6.7l-head-17-22a-studs.htm?utm_source=bing&utm_medium=cpc&utm_campaign=(roi)+product+listing+ads&utm_content=all+products&utm_term=A1T6-12VALVEHDSTD17-22A?utm_source=bing&utm_medium=cpc&utm_campaign=(roi)+product+listing+ads&utm_content=all+products

 

[CorneliusRox]

Regulars are worse than ARP 425's (probably closer to the older 2000's), and then the H11's are a little bit higher strength than the ARP 425's.
They stopped making them though... So ARP seems to be the only legitimate 12mm choice now.
I am sure Scheid's are good too, but I haven't seen anyone with them yet.

 

[Onefastcr]

Bump! These are non h11s. 375$ shipped.

 

[zfaylor]

Regulars are worse than ARP 425's (probably closer to the older 2000's), and then the H11's are a little bit higher strength than the ARP 425's.
They stopped making them though... So ARP seems to be the only legitimate 12mm choice now.
I am sure Scheid's are good too, but I haven't seen anyone with them yet.

The a1 stud designs are owned and produced by arp now. There are multiple part numbers for the arp branded studs now. My a1 Haisley studs showed up in an arp box from Haisley. The info is direct from patty. She was telling a group of about it at sdx last year.