Here's a couple other bits of information about the WAAG Bumper Guards that you might be interesting in if you are considering them. Its from some posts that I copied from the Edmunds.com Toyota Forums.
It basically describes how the guards affect the overall dimensions of the 4Runner. I can definitely vouch for the added length, but I can't say for sure if the changed approach angle is correct or not
Length-wise
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The bars lengthen the vehicle by about 10" including 6" in the front and 3" in the rear. This is somewhat adjustable in the front, though 6" is about the minimum. You might want to factor this in your buy decision. How big is your garage or parking space?
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Approach/Departure angles
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it looks like the approach angle will be reduced, while the departure angle will not be. In the rear, the exhaust tip and hitch receiver will limit departure angle as much as the bumper guard mounts will.
In the front, the changes will depend on the angle at which you approach a slope. Assuming that you approach a slope directly, the thick plate steel mounting plates (below) and the plate steel tube mounts (these are the things with the rubber covers) that bolt to them will indeed reduce approach angle. If you're approaching a hard surface with a steep angle this would be a problem. If you're approaching dirt or sod, it would be less of a problem, as the plates would gouge a trench in the dirt for a short distance. This would produce some excess front end lift and resistance, but would not stop you in most situations where the surface is soft. You would gouge the rubber covers some, however. I'd estimate the angle reduction at more than 5 degrees, but less than 10.
Approaching at an angle, the reduction would be less, but it would still be there.
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Hope this info is useful and can help in anyone's decision making
