Get a Mishmoto, changed mine 10K ago, very nice piece, I thought at $850 from Full Force Diesel it was reasonably priced and shipped fast.
Bought the '09 King Ranch dually on May 1, 2014 with 83,000 miles.
Today, January 5, 2016 at 295,000.
-100,000 out of warranty, deleted, H & S
-HPFP - ate itself at 131,000 - $8,000 cab off, full fuel system and injector replacement, egr delete, up pipes, installed fass fuel/water, coolant filter, Caterpiller ELC.
-150,000 miles, rear end oil, trans pan oil/filter, ball joints, front u-joints.
-175,000 AC tensioner, Accessory Tensioner, all idler pulleys and belts.
-Changed oil every 5K/fuel filters every 15K, grease everything.
-BFG Long Trail Tires lasted 110,000 miles. (i replaced with transforce ht, junk in my opinion, only 70-75K)
-Morgan at Midwest Diesel did the rockers at 205,000. The rockers were getting noisy, good timing to have them done. Morgan is awesome and affordable, did a very nice job and in a single day.
-285,000 (Oct 15/2015) radiator, eroded front water pump cover, alternator, all pulley bearings, new bfg rugged trails.
The new Blackstone Oil analysis makes a guy feel a little better about the ton of time and $$ spent on maintenance. Out 6.4 really loves the mobil delvac 15/40 we have been using.