N55 Decat downpipe queries
Do all decat downpipes flow/perform the same? Give or take..
Also, I've noticed a few manufacturers have separate parts for say the (EWG) M135I/M235I etc to the M2. I thought they were all the same. I'm about to buy, I'm not a cheapskate but I can't get excited about a hollow pipe.
Is it worth spending the extra?
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