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      05-30-2012, 10:05 PM   #3
Formerly Known As ftconstruct
Drives: 13 E92 M3
Join Date: Dec 2007
Location: New York

Posts: 665
iTrader: (14)

The primary cats remain and the secondaries are deleted. The change in pitch is exactly why I did it. It doesn't increase the volume much but it adds a higher pitch that it didn't have when the ES was installed by itself.
2013 E92 M3 DCT/LMB/Blk Nov/Competition/Premium/Cold Weather/EPS/BMW Apps/SAT Radio
FrankThomas is offline   United_States
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