So I wanna get some exhaust mods and I’ve been doing a lot of research but a lot of it confuses me still. I wanna get Borla S Type axle backs. I’m having trouble with weither to get cat back or axle backs, what does the cat backs replace. Can I get the axle backs and then change the over the axle piping later ? And then what do x pipes replace ? Do all of them get rid of the stock resonators or does the cat back get rid of those? I’m a beginner so I need help!!