i tried i have them weld my y pipe up, he did not get the top part and it still leaked, so i had to grind all the welds down (which was very difficult getting inbetween the pipes) so i couldent flatten all the welds. i put the clamps on and it they did not seal up fully so now im gonna have to pull it all off one day.
the clamps i got from pacesetters sealed the headers right up, but they were not stong enough to hold the headers together. those clamps that i posted are. the clamps will seal them up (i would use some rtv on them while your at it) if you dont want to have to go thru the trouble of welding.
welding turned out to be more of a pain in the ass for me. plus you could just take the clamps off if you ever wanna take the headers off and it would be alot easier coming out, not all in one big peice.
all in the route you wanna take tho.
