BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i) - View Single Post - Aftermarket midpipe to OE catback question

E30 Racer · 09-06-2012, 04:17 PM

Presumably, the post-merge aftermarket pipe diameter is larger than that used by BMW. How does this affect the ability to join them without replacing the coupler on the catback side?

09-06-2012, 04:17 PM	#1
E30 Racer Private First Class Drives: '11 1M, '99 540i/6, '89 325is Join Date: Aug 2011 Location: Ohio Posts: 169 iTrader: (1)	Aftermarket midpipe to OE catback question Presumably, the post-merge aftermarket pipe diameter is larger than that used by BMW. How does this affect the ability to join them without replacing the coupler on the catback side?
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