Hey guys, some may think I'm crazy for asking this, but I'm wondering if anyone has tried running a performance cat back through factory mufflers or any mufflers. The reason I ask is, I have a Solo exhaust (I think it's the V1 or V2 it has the T in front of the mid muffleR) And as Solo states "in 4 cyl mode there is a low guttural". That sound is driving me crazy. I LOVE the way it sounds under power, but when normal hwy driving (this is what I mainly do), it seems like it always be in that "gutteral" mode. I have tried to adjust the J pipes, and I can't seem to make it sound any different. Any thought would be appreciated.