I found a decent looking set on Amazon took a while of searching I think I found via BMW part number determined with realoem. They are pricy still so I was looking into refurbish my cat pipe by taking out the assembly, build a frame from wood and steel nto hold in exact position and cut our and replace with generic but large enough cats.

For now I've punted replacement with some angle O2 extension an an occasional adaptation reset.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)