Re: ARP standard vs. OEM 6 bolt
 

Never, okay maybe just this once. :)

Re: ARP standard vs. OEM 6 bolt
 

Like Brad and others said, The Permatorque seems to be a very forgiving HG as far as surface imperfections go.

Re: ARP standard vs. OEM 6 bolt
 

It had better for the money you pay for it...

Re: ARP standard vs. OEM 6 bolt
 

I'm going to bolt on a fel-pro performance composite gasket and use the stock head bolts... we'll let this be a little science experiment. Yeah, I'd love to bolt on L19's with a permatorque but thats over $400... this test will cost me $40 and a day of my time. I'm not scared of having to pull the head again.

Re: ARP standard vs. OEM 6 bolt
 

L19's and a mitsu mls gasket with a good surface prep. Best comb I've ever had. All last year I beat the hell out of my car and had no problems with my head gasket over pushing coolant.

Re: ARP standard vs. OEM 6 bolt
 

Good luck and thx for trying something different out.

Re: ARP standard vs. OEM 6 bolt
 

Based on what other people are saying, ARP's cause the (any) HG to fail after 4xx horsepower.

And since I will always be a fan of the factory mitsu composite headgasket that has worked for 20+ years...Has anyone used L19's and a mitsu composite?

Re: ARP standard vs. OEM 6 bolt
 

Signed in on this experiment! I want to see what happens also!

I was thinking of trying to build a 11:1 compression using E-85 and was wondering what head gasket/bolts I should be using. If the Feeler pro and stock bolts work GREAT!

Re: ARP standard vs. OEM 6 bolt
 

Well, this turned into a cheap fel-pro with arp's cause I was too lazy to swap them. I will post up the results of this. If you don't hear anything, that means its not pusing coolant.

Re: ARP standard vs. OEM 6 bolt
 

The felpro and arp's have yet to leak any coolant. I ran upwards of 35psi friday evening running around downtown. had the vacuum line to the FPR blow off at WOT which lead to lean misfires, still holding strong. Now that the 61 is toast it will probably last quite a while.

Re: ARP standard vs. OEM 6 bolt
 

Well, That setup didn't last long... I guess its time to verify the surfaces are still flat, and step up to L19's, maybe ring the head for good measure.