Is there a hands down favorite out there? I looked at HPF.com and they have a few to choose from. Does the one with the divorced downpipe work better? How loud is loud when it's at wot? The ad said's that it is loud. I was told by GrimJack I had to replace my stock elbow and since he's smarter than I am, that's what I intend on doing. I just want to make sure I get the right one.:1zhelp: Thanks alot (again)