Nickel and diming here, but I suppose I have more hitch weight. I have the same factory crossbar as you do, where the factory gooseneck/fiver installs 20" from where it's supposed to be under the long bed, then have a B&W installed above the rear axle over where my splice is. So whatever that B&W weighs... though I'm sure that thing is under 100lbs. I also have a steel (instead of aluminum) two piece driveshaft as well as a new crossmember where the 2 piece driveshaft pillow is installed...I'm beginning to see where the extra ~350lbs is.