My TTI headers on aluminum head BB have a tendency to loosen, which requires occasional retightening. Am using studs.

There are a number of locking technologies to help, I did an investigation of several and it appears this is as simple as any, more effective than others, and reasonable in cost. Amazon but not Summit sell.

I did a search on our forum and found no references to their use, which is surprising.

This U Tube video, comparing several options for locking was impressive. There are several such videos.

https://m.youtube.com/watch?v=WPCfd4Zr6rE

Has anyone on the forum used them, and if so,,,opinions?

I am going to order up. Unfortunately sold in packs of 8, headers require 12.