Yep, 68lbs of added unsprung mass. According to a post on another forum unsprung weight is added at 5x times what it really is. So according to that this is like adding 340lbs of sprung weight.
I have no way to know if that is true or not, but it sounds good.
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** 2007 Tundra 4.7L 4x4 DC
** Silver Sky Metallic
** K&N Intake
** JC Whitney Nerf Bars (Black)
** And the Glock 30 next to the cup holders