I have a 2010 RK Classic (totally stock). I just want a deeper rumble tone in the exhaust, I don't care about performance increase at all. Don't want to get into the tuner add on thing. I was looking at either the SE Thunder Street or the SE Street Performance Touring. I've read through dozens of threads it seems and there are a lot of comments that because of the cat converter in the header pipe, slips-ons will have no effect on the sound of the exhaust (ie: I'm wasting my money). Can anyone categorically confirm if this is true of not? I'm even getting mixed answers when asking some of the guy's at my dealership.