How about the wide band type clamps like the trucks use? Or a flanged connector like a catalytic converter uses? I've used the wide band clamps on stainless, just oversize the end of the pipe that is closest to the engine, slide the next pipe in it, and tighten the clamp. Just a touch of exhaust sealant in the joint will prevent any of them nasty ticky sounding exhaust leaks. Hope I described it so you understand what I mean.....