5/16-18 x 1" Header Bolts Do They Exist?

Kevindc said

No way to use 12 point on four of the bolts, not enough room to get a wrench on them (TTI Headers). Found what I needed at Jegs but it was a direct ship from Hedmen and took 4 days. I should say they will work but I would like to have had stainless steel.

Click to expand...

12 points work fine on tti headers, that's all I run. You have to start the inside radius one first, run them in a bit, then start the bolts you have an open shot at.

If you snug up the end bolts, no way you get the inside radius bolts in. Example the second bolt from front on each side.