I just got a full cat back system (tip separate) from Summit earlier this week and got a little time this morning to see about installing it. It went in pretty smooth (had to make one cut on the long straight pipe as it is pre-cut for a long wheel base with instructions to trim as needed for short wheel base). I am about 80% happy with the fit of it but it does route under the edge of the spare tire so I guess it will require a little manipulating to remove/store from now on but for the price, sound, and overall quality of the muffler and materials I don't think it can be beat. I like the muffler quality better than the last Flowmaster I had and it sounds a lot better as well. The "kit" is in the Summit catalogue as their own but when it arrived and I opened it up it is made up from components by IMCO (International Muffler Company). It starts with an IMCO straight pipe that is 3" with a 2.5" end to fit onto the stock outlet behind the cats. Then it has a 3" SI/SO turbo style muffler, a 3" over the axle piece, and a 3" 90 degree exit pipe. It also comes with all the hangers, 3" clamps, and 1 2.5" clamp as well as a couple bolts, nuts, washers, etc. All the bends are nice mandrel jobs. I also bought a 3.5"X10" stainless steel tip and installed it over the exit pipe so that added about $20 to the total cost. Once I had it all clamped in place I took my little wire feed MIG and put a few spots on each connection to prevent any accidental movement or rotation down the road. It sounds great, the truck seems to take off a little better and the tip looks great IMHO. A good system if you don't want to spend more than $150 but don't want a crappy muffler shop system.
Between the FIPK, Edge programmer, and this exhaust the truck is a blast to drive now

 

Congrats!

 

How's it sound? Soundclip maybe? I'm looking to do something with mine, but, I'm low on funds, hehe