garydan
1/2 ton status
or is it crap and I should get a better one?
depends on which gasket your talking about.. When I installed mine I opted to weld the flanges straight to new 2.5" pipe so no gasket there. I seem to have the best luck with the cheap Napa exhaust manifold gaskets that you can drop in instead of removing the bolts all the way.
I used the gaskets that my headman headers came with(head to header), i also coated them with copper permatex. They are on there for 3 years and still dont leak. The collectors on mine tho are 3 inch ball flange, they were loose all the time after wheeling. For those i used grade 8 bolts with all steel cat lock nuts. I chose ball flange over the normal collectors and seems like a wise choice so far but that for a 3inch pipe.
A racing buddy of mine doesn't use gaskets and I didn't on my iron manifolds.
which header part number did you go with?
i remember seeing the other discussion but was all confused about which fits the best in the later model K5s to clear the spring shackle
also,
check your header bolts(to the head) in about a week after a few heat cycles and make sure theyre all snugged up.
most header leaks ive ever dealt with have been from the bolts being a bit loose after the first few heat cycles. when we did header installs at the shop, we'd always have the customer come back a week later and double check the header bolts for him.