Re: Pushing coolant... New L19's or ring head
 

I heard they will crack your head first??

Arp told me 90ft lbs. 30-60-90

That sound right?

Re: Pushing coolant... New L19's or ring head
 

There are 2 L19 stud sets, one set made with the bigger 9/16" thread on the nut (I think Marco has said they were made for him?) Vs the standard ARP stud at 12mm. When ARP made the L19 studs I would guess they just copied the standard ARP stud so they might not handle as much torque as the 9/16" studs.

~John