Need Advice on cracking wastegate pipe, suggestions

[Unlikely Hero]

Ok I'm looking for some sort of flex pipe or slipon piece to keep my wastegate piping welds from cracking. The big bitch is its 1.5" (38mm) and I can't find anything this small. This setup is for a different car entirely so theres nothing aftermarket wise for it. Anyone have any suggestions where to find something like this that I need? Thanks
=Jason-

[sleepydsm]

Go to Checker. I don't think I understand exactly what you have in mind, but try their various diameters of flexible muffler pipes. Hope that helps. I got mine for about $6 for about 2 ft of flex pipe.

[JET]

First question, why is the WG flexing? I would just weld a brace on the pipe to keep it from flexing.

[Unlikely Hero]

Well i don't think its flexing just with the vibrations of the engine I'm afraid it will crack. i already went to advance auto and they don't have anything in the 1.5" or 38mm size. I've heard about some type of slip fitting but I don't know how to do that.
=Jason-

[JET]

The WG should be hard mounted, at least before the WG. It shouldn't be an issue. I guess you could put a flex on afterwards if you have it routed back in. There really isn't a point though as there shouldn't be a flex section in the exhaust anyway (before where the WG would mount back in). It all should be hard mounted.