Originally Posted by Corraleno
OK, here's the quote from the Pilot's manual about the WD hitch (don't know why I didn't look this up last night -- duh):
"A weight distributing hitch is not recommended for use with your vehicle, as an improperly adjusted weight distributing hitch may reduce handling, stability, and braking performance."
That was probably written by a lawyer or risk manager who doesn't understand towing.
Even an improperly adjusted WDH (that is, with insufficient tension) is better than none. Also, it reads "not recommended"; the manual isn't saying that your vehicle would be damaged.
The worst thing that could happen is that the Honda receiver will flex and the weight transfer will be less than totally effective. There are ways to reinforce and stiffen receivers, and lots of OEM receivers need it (like those used on GM pickups for a number of years).
With respect to unibodies - I tow with a unibody vehicle, with Eaz-Lift 1000 lb bars that have plenty of tension on them. The challenge with a unibody design is finding good mounting points for the receiver. Apart from that, I am comfortable saying that unibody is superior to body-on-frame because it will flex only a fraction of the amount that a full frame flexes when the torsional load is applied. A unibody is much stiffer, and a given amount of tension on the weight distributing bars will transfer more weight to the front tires as a result.
I think Inland Andy's recommendation is completely logical. An alternative might be an Eaz-Lift with 550 lb bars, and a single friction sway control.