thank you guys! i have not seen the v8 hitch yet.. i like how the v6 hitch looks. I've seen many 4runners with the aftermarket hitch and they looked rusty, i don't need to tow anything just a 4 bike rack!!!
The V6 type hitch will rust too, but most of it is hidden behind the bumper cover so you won't see it. If you do go with the V6 hitch, I believe it can still be ordered from Toyota (not sure how much), but as I recall, some of the other threads on this, the mounting bolts are not available from them. You will need hardened bolts and washers for the install. Do a search, there are several threads on this, and I believe a few may have the info on the correct size bolts you will need. There may even be a video or two on replacing the V6 hitch with the frame mounted model, which will show you how to remove the bumper cover to remove/install the V6 hitch to the rear cross member.
As long as you only intend to use a bike rack or tow light trailers, the V6 hitch will meet your needs.
Also, if you do decide to go with the V6 hitch, be careful about the length of the bike rack shaft that inserts into the hitch receiver. Because the spare tire sits just behind the rear cross member, the amount of space for excess bar length to fit is limited, and some devices may not fit all the way in. I, and others, have had to shorten some aftermarket bar mounts to get them to fit properly. And, one last bit of advice. If you do go with the V6 hitch, before you install it, try fitting the bike rack bar into the hitch first. The original V6 hitch's had a very tight clearance spec for the 2" receiver socket. I and others have found that some aftermarket tow bars and other accessories can be a very tight fit and may require force to get them in and out of the socket. Test fitting before the install could save you a lot of grief later on.