I'm running the RevTek (part 432) spacer kit.
The main reason I went this route, it was cheap. Several 4x4 shops had it in stock so I was able to shop around for best price.
Did it accomplish what I wanted? Yes and no.
Yes - Got the lift to fit the tires I wanted and the look I was going for.
No - I can not do any serious off-roading, which is ok for now (I'm a novice in this area) but I will want take on more. Which means I will have to spend more money.
Someone on here told me, save up the money and buy the better lift... Go with the Bilsteins, is what they said. Did I listen? No. Do I regret it. A little. But overall I am satisfied ... I paid $800 for the lift, install, mount-balance and move the TPMS and the alignment.
But as everyone will tell you what they dislike about the runner, the nose dive. The RevTek in no way helps with that. The Bilsteins will.
My 2 cents, go with the Bilsteins. I don't see what it will void. Many others have installed them on here. The dealer where I bought my runner only did Pro-Comp lifts and said "those don't void any warranty, not sure about anything else". They just say those things to get you to drink their cool-aid.