This Tundra 4WD Differential Drop is highly recommended for 4WD Tundras with a 2.5" plus front suspension lift. This kit will lower your front differential and reduce excess wear on CV joints and axles. This drop kit is perfect for trucks with our Pro-Billet Series lifts or with pre-existing coil spring spacers already installed. Supreme Suspensions products are developed and rigorously tested by in-house ASE certified specialists, in conjunction with dealerships and professional racers across the United States. Our Pro-Billet Series spacers are precision CNC machined from solid blocks of T6 Aircraft Billet and receive a special anodized coating. This is the best material to use due to its sheer strength and light weight. The spacers will never compress or warp under even the most excessive loads. This Tundra 4WD Differential Drop Kit Includes: 1x Pro-Billet Differential Drop, Installation Instructions, Installation Hardware and Supreme Suspensions Pro Pack.