109387, RE: 420a Turbo upgrade Posted by PinkPixi, Dec-31-69 06:00 PM
With off the shelf ARP head studs and a good O ring setup you have enough clamping force to handle 30-40psi.
My Husband runs 35-40psi in his eclipse and has done so for over 10 years.
Here is a pic of an o ring setup.
Here is the Tool that can do this.
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