Thread: Volkswagen Single Cab Street Rod with 400 Hp Chevy crate motor

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Originally Posted by 34_40

Thanks for the "car show", great way to spend a Saturday morning with my coffee.

What have you done with the header bolt issue? Any resolution?

I have been told that grade 8 bolts are unacceptable for header collectors. I have used them before without issue, but the new headers are much more substantial and from what i can gather, do not give like the thinner flanges, so the bolts give. something about stronger but more brittle. I used the grade 2 bolts that came with the headers and no more breakage.