Got 'em both yesterday. Got a Flow 40 Single in / Dual out installed at The Install Shop for $265 after tax. They found that my pipe before the factory muffler was leaking in two spots, so they just cut it out and replaced it.
Got a K&N 57 series intake in from 4 Wheel Parts yesterday as well. Put it on last night while I was grilling some burgers. Lot of little stuff to do to get that thing on there.
Truck sounds angry now. I love it. Not sure if I picked up any real power out of it, but maybe. My butt dyno isn't calibrated to the truck just yet. Only had it a month.
Scuffing the bed up this evening so I can spray the liner in tomorrow. It's an epoxy type of stuff similar to Rhino and Line-X, but much better than that duplicolor crap they sell at the parts stores. Wish me luck.