[Pampered-Z]

Those split bolts look pretty trick!

But based on the gaskets your using you may still need to go through and retighten after a few heat cycles.

I have one of the first sets of Jethot headers for the 93s and there is no room for the locking type bolts. Because my heads are heavily ported the only gaskets that fit are the Felpro race gaskets which has almost no material on the ends, so if the bolts get loose they blow out the ends of the gaskets.

What I do is to spray the gaskets with copper coat, then keep tightening the bolts (ARP stainless and I use anti-seize), through 5-6 heat cycles and they will finally stay without backing out. I've taken a offset boxed wrench to the grinder to make it thin enough to pass between the bolt head and header tube and cut it down so I can get bolts tightened down properly. To get to the very back bolts on the pass side I find it best to get from the bottom.