i've got those same headers, installed them about 3 months ago. does your sound good at idle, but sounds like a leak under load? if so, i've got the same problem. thought it was the slip fit so i had the muffler shop weld it solid, didnt change it a bit. dont bother getting a clamp.
i've been told they'll have a slight leaking sound just because the metal is thinner than a cast manifold so it doesnt suppress the sound as good.
im going to try intalling new gaskets all around and use this stuff edelbrock makes. its like header gasket glue. we used it on other thorley installs and its what the local speed shop recommends. couldnt tell it it made a difference causs the trucks we put them on had racing mufflers so a little leaking sound couldnt be heard.
i asked the muffler shop about copper or aluminum gaskets and he said he doesnt really like them, you have to have the flanges dead on level w/ each other or they will leak.they are only good if you take your exhaust off and on alot.
oh ya and i got mine with the dropped y-pipe.mine has 3" of lift and there looks to be plenty of driveshaft clearance. much better than stock.but i do think it hangs too low, im hoping that the transfer case skidplate will take the majority of the load . havent hit anything yet.
good luck and if you solve it let me know /forums/images/graemlins/thumb.gif
