I have a question about the SPT exhaust. I was reading the different reviews and I saw that you had another and then switched to the SPT. Do you feel like the switch was a good idea? Can you tell a difference in power and sound? I'm debating between those, the magnaflow exhaust, and the AVO twin mufflers type 1 that are reviewed. I like the SPT the most because it's a subaru quality part but if it isn't giving any more performance that is kind of a downside.