The problem with your question is, what is loud to you? How loud is your truck now? Have you measured the decibels? You are basically asking questions of opinion and everyone's opinion is different. The fact that you are looking at an off-road y-pipe without cats, the truck will get louder from how it is now...If you want to keep similar sound to what you have now, put a catted y-pipe in...i would like to keep it the same loudness maybe just a little louder ive watched some you tube videos but cant really tell how loud it is.