Which Expandable Coolant Pipe??

I have seen many posts about the Expandable coolant pipe fix for the N62 engines. My question now is of those who have used or installed them, which one is the best? I am wondering if any of them had failed or had any problems after the installation. As of now I am aware of kits made by All German Auto, BMP and Bimmerpipe. I was looking at doing this while the engine was apart replacing the usual leaky gaskets. Any help is greatly appreciated.

From what I know, most seem to have no issues with the All German Auto pipe. I think that would be the best choice.


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