:help: Any one who is running this, I am getting ready to order this exhaust and the part numbers are confusing, which one is turbo back, 680006 or 680007 or are they both turbo back, Looking at the pics they both appear turbo back with different mufflers but are both listed as cat back, I would assume they both are turbo back since they need to go from 4" to 5". I want this system for a crew cab. Maybe one is for the Crew cab and one for a extended cab? Thanks in advance

The kit I ordered was the 680006. Turbo back.

they are turbo back. getting the cat out is a pain in the ass and will take some twisting and turning. the stock exhast came out quite easly and is anouther pain unless you keep twisting and moving it around. it took me 2.5 hours to take the stock exhaust out and get the turbo down pipe and cab section on before my friend showed up to help finish it.
also when you get this exhaust in wear gloves when you take it out. the edges are very sharp and will cut your hands open like nothing. get a metal filer(sp) and a hammer. make sure all pieces fit into one anouther before putting them on the truck. and i recomend droping your spare tire to put this system on. it took us about 20 min extra to get the last piece on and all buttoned up.

How does the Summit system sound? I am looking for something without drone at highway speeds for towing, but that has some rumble at idle and full throttle.