4-pipe mod exhaust tube sizing

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4-pipe mod exhaust tube sizing

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09-22-2020, 11:43 AM	#1
Waltzy23 New Member 3 Rep 19 Posts Drives: 911 Turbo, BMW X5D, E90 M3 6MT Join Date: Jun 2020 Location: FL iTrader: (0)	4-pipe mod exhaust tube sizing Looking at potentially getting this done. Does anyone know what diameter the internal piping is?
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10-05-2020, 11:32 AM	#2
Waltzy23 New Member 3 Rep 19 Posts Drives: 911 Turbo, BMW X5D, E90 M3 6MT Join Date: Jun 2020 Location: FL iTrader: (0)	close thread, 2.5" is the larger perf piping. I'll find out the others when I get in there
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