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I think I read that the pipe diameter is larger for the JCW exhaust so you may need some special pipe expander to fit the backbox at the point where you chop the old exhaust.

I assume the fixings should be the same as I have read some people installing the F56 JCW Pro exhaust to an F55 by adding an extension
 

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Graham welcome to the forum. Pardon my ignorance but what is a back box? I feel like a Dummy for asking but between UK English and USA English it is easy to talk about the wrong parts.:D:D
 

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