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Originally Posted by djbrady
Thanks so much for putting this together. Two quick questions:
(1) Will the OEM rear (cat-back) M exhaust bolt up to the existing cat-forward piping?
(2) Any differences to consider when dealing with a convertible?
Again…thanks again for taking this on. I'd really like to do this conversion and make it a fully functioning system.
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1m uses the same mid pipe as a 135i.
I do not know how compatible everything will be on a vert.