[rickst29]

Now of course, Toyota doesn't sell a "WDH". They're selling only a WDH-capable receiver. And in spite of their attempts to "diss" their own V6 Hitch Receiver and up-market their customers, the V6 Hitch Receiver is only slightly less strong than the V8 Version.

Rich, I'm in an almost-unique position to discuss this because I have owned BOTH the current "Gen-4+" V8 and V6 models. (Our year-old V8 was totaled in a spectacular accident a few months ago, we "downgraded" to a brand-new V6 for a replacement.)

BOTH hitches are beefy and can easily handle the torque from a WDH which is balancing up to 800 lbs of tongue weight. If you're towing a lightweight TM, or a boat, your 4Runner is gonna run out of geometry (the wheelbase is short) WAY before the hitch receiver suffers any damage from the WDH.
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And even if it did, you can have a new hitch receiver bolted onto your "little" V6 very easily. The V8 is a smoother engine, but the Tranny and Brakes and Tires and suspension are identical. Except for slightly more noise and running in 4th instead of 5th, we don't miss the V8 at all. Towing a TM absolutely doesn't need it, there's not ANY TM model which presents too much moving mass or WDH torque for the V6 hitch to handle.

We're delighted to take advantage of the better gas mileage and the up-front savings. Unless you're towing an extremely heavy Trailer, the V6 with "Sport" suspension is a better TV than the V8 "SR5" or "Limited", beaten only slightly by the V8 "Sport".