I'm trying to ID or gather any info I can on my 750 K3 exhaust. I'm planning on pulling it to polish and I was going to install fresh copper gaskets and replace the old allen head bolts with new ones (stainless?). Since these are not stock headers, is this mounting method OK? According to the parts fiche, the K3 headers mounted with phillips screws (8x22) -- I guess someone just replaced with allen head? Also, it did not come with the joints (outer fancy looking flange) -- am I OK mounting these like they are without them? And if it helps for ID, the muffler does have a removable baffle secured by an allen head.