1. Are they bolt-on, or do they require modification?
Yes, they are 100% bolt-on. You will have to remove some factory items, but they use all existing bolt holes. You can go back to stock at any time.
2. What types of material are the skid plates made from?
The front, transmission, transfer case and fuel skids are all made from either 3/16” thick steel, or 1/4” 5052 aluminum. 100% MADE IN USA, Fort Worth, Texas.
3. Do I need replacement fuel tank straps?
No. Replacement fuel tank straps are not required for the 2025+ 4Runner fuel tank skid plate.