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Stock4Evr · 05-30-2015, 10:50 AM

I have read much about the tee mod keeping both pipes open and how the BMS Performance Exhaust keep both pipes one all the time. Besides sound is there any real benefit keeping both pipes open all the time? Are there any drawbacks?

05-30-2015, 10:50 AM	#1
Stock4Evr RetNavSpook 67 Rep 398 Posts Drives: 2012 135i - 2016 320i Join Date: Jan 2014 Location: Canyon Lake, Texas iTrader: (0)	"Tee" mod I have read much about the tee mod keeping both pipes open and how the BMS Performance Exhaust keep both pipes one all the time. Besides sound is there any real benefit keeping both pipes open all the time? Are there any drawbacks?
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