I finally replaced the original suspension on my 07 SR5 V6 4WD with 155K miles. I did all kinds of research including Bilstein 5100s, Eibachs, KYBs w/ lift, etc. Finally, I found Ironman 4x4 and took advantage of a sale they were having for their Nitro Gas 2" suspension lift kit. I also had purchased some 2018 T4R wheels/tires that were a take-offs that I put on. They're a tad taller than the stock 265/65/17s. Overall, I'm really happy with the new suspension and wheels. The ride is so much higher and it handles so much better! I was bottoming out (hitting bump-stops) all the time on basic speedbumps. Now, I never feel the bump-stops. I did the install myself, it was a learning experience since I've never done anything like this before, but I'm glad I did it.