Although I do have one of the expensive joiners on a 430 Husky, all of my other Husky's have a cut up 20 in BMX tube from my sons old patched up pushie tube. One of them has been on there since 1986 and it still works just fine. Not sure what brand of tube it was, but is a great fit for Husky pipes and mufflers, with no hose clamps and a slim fit so it doesn't push out the side covers.
cheers