So far I have had no rubbing issues on my S Pipe, that could be because I have a front poly engine mount and my exhaust has a tab on the axleback that bolts to the frame of the car so there really isn’t any flex for it to rub.
Sounds great, a deeper louder tone that is mainly noticeable when I get on the gas. Im satisfied with the S Pipe, keep in mind no hardware or gaskets are provided.