Back on the subject of your exhaust bolts, don't use either grade 5 or grade 8 for that application.
Have a look at sites such as www.fastenal.com if you question this.
(I'd upload the info and post it here except for some strange reason ih8mud won't allow me to post pics right now.)
It's misguided to think you're getting stronger bolts by using Quenched & Tempered (Grade 5 and Grade 8) bolts in high temperature applications.
Grade 2 would actually be stronger in this high temp situation.

Edit: Yay... I can upload pics the way I used to once again ... Thanks administrators... This isn't from fastenal.com but it says something similar to what they do:

And maybe I'm talking sh#t saying Grade 2 would be stronger ... but then the above text supports this view...
(I sort of expected someone to challenge me on that when I wrote it.)
Have a look at sites such as www.fastenal.com if you question this.
(I'd upload the info and post it here except for some strange reason ih8mud won't allow me to post pics right now.)
It's misguided to think you're getting stronger bolts by using Quenched & Tempered (Grade 5 and Grade 8) bolts in high temperature applications.
Grade 2 would actually be stronger in this high temp situation.

Edit: Yay... I can upload pics the way I used to once again ... Thanks administrators... This isn't from fastenal.com but it says something similar to what they do:

And maybe I'm talking sh#t saying Grade 2 would be stronger ... but then the above text supports this view...

(I sort of expected someone to challenge me on that when I wrote it.)
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BTDT 
