Well I'll keep it simple I decided to throw on a CAI on my 15 Overland 3.6. I was throwing it up in the air for a while and decided it once I found the right price I would do it. I went with the Spectre polished intake for $150 shipped thru Jegs. It is the same intake without the pricey name. I'm not gonna bore you with install photos cause it is pretty much the easiest intake I ever did. The intake definitely cleans up the engine bay. It has a nice throaty sound once you step on the gas pretty much at any speed. They say around 10-15 HP gained but whatever this isn't a race car I'm driving. I just installed it so I will update if I see any better Mpg, people say it gets better w/ the intake.