Locking Header Bolts, new design

[63Futura]

Has anyone ever heard of or possibly used these locking header bolts? They have an internal expander that you tighten with an allen wrench.
Any thoughts? I am attaching the link for the site.

http://www.go-breslin.com/

 

[rbohm]

8) i swa those in one of the magazines, i like the bolts.i think i will get a set when i get some headers from azcoupe.

 

[63Futura]

That is exactly what I am thinking of. I installed his headers a couple of weekends ago, and am thinking of swapping out the bolts. I just need to write the company and find out if any retail stores sell them.

 

[65coupei6]

63Futura: Currently, you can only buy them direct. The one's for our inlines are part number 600-101 and they are $64.98+ $3.50 shipping. (They only come in a 12 pack so you will have one extra) Which is a little expensive. They are currently working on a contract with CSK Auto.

Why do I know so much about them? Becuase I have to know the competition.

In my opinion, I think they will have a tendancy to break. They say they are reuseable. But, the bolt is actually split at the end. The allen set screw is what spreads it apart to hold it in the header. Plus they are stainless steel. I know there is high grade stainless but I am not sure yet what these are made of. You take any bolt spilt its end and expand it then contract it, it will eventually break. Plus add heat from the headers and I think you will have a problem. Remember this is only my opinion and I can be wrong.

I still like the Stage 8 fasteners. $39.95 and free shipping. Not because I sell them but I personally think they are a better design.

 

[weeds]

The size of a bolt is very important in fastener design and gasketed joints. Why use a 5/16-18 when a #12 will do? Is a 5/16 much more than the #12? Does it make a difference? It does when you use a million a year like Ford did at the time, so I think that the size of the bolt is important. So we take a 5/16 bolt, drill a hole down the center, split the threads, and tap it for another bolt. Even if the grade of material is significantly stronger than the original, I see failure either in the tightening operation, where the bolt will typically see more stress than in service, or in the removal process, where even the best bolt will exhibit some problems in an exhaust application.

Nope, not me. I'll use a bolt where the stress and shear areas have not been compromised. I've broken enough to not add to the problem.