Yes. Because the IS exhaust is louder, so are the rasps. I am looking to install the resonators and then will report back.
Current: 1987 E30 325is, 1997 E36 M3, 2004 E46 M3, 2015 F80 M3
Past: 2011 E92 M3, 2011 E92 335is, 2008 E90 M3, 2007 E92 335i, 1995 E36 M3