Mike the cat delete pipes with the borla are almost as loud as cats with the xpipe when you hit it but less noise when your cruising.At least that's how it sounds to me.It takes me about an hour to take the rear clip off with the lift.I need two people to help with the clam shell,the rest is a one man job.If your just changing the exhaust you really just have to take off the clam shell diffuser and bottom grill. hope this answers your questions. CJ