SeventyMach1 has it right. I got mine from Mac, really cheap had a shop install them. I think they are leaking now but so is my h-pipe since the t56 swap. I am looking to do things over. I have lots of heat from my engine which I know is indirecly responsable for some of my cars problemss. I am looking into getting new exhaust parts and they all start with ceramic coated headers-no matter what type I end up going for/being able to afford. I skimped on the exaust, I've paid for it with the heat from my engine bay- i think it killed my stock distributer but getting a new one was sweet what a difference!
All in all I wish I had the Money to do it right the first time. I went all out but on the cheap end with Mac unequal hd treated? shorties an o/r h-pipe and chokemasters. Suck it up and get some good parts or you will be buying them a second time around like myself.
Just being truthful pm me with any q's
-fawcett