I just traded my 6.0L for an 08 that's stock, my other truck had 4" turbo back, with no converter and a Silverline catback. I really liked the looks and sound of that setup. So I've been looking at doing a tune, exhaust and intake for this truck and it's alot more expensive, so it won't real soon, but I'm just interested in what it is I need. Now can you get by with the factory downpipe to a DPF/CAT delete then to a filter back exhaust? Or do you need an aftermarket downpipe too? What about the S&B intake system for like $269, is that a decent setup?