UMI Performance 6400 Stage 2 Suspension Lowering Kit 4.5" Front / 6" Rear Drop

The UMI Performance 6400 is a comprehensive Stage 2 suspension lowering kit engineered specifically for GM squarebody trucks and SUVs. This complete system delivers an aggressive 4.5" front / 6" rear drop, transforming stance and handling without sacrificing daily driveability.

Front lowering is achieved through a combination of UMI drop spindles and UMI lowering springs, maintaining compatibility with factory GM brakes and wheel bearings for a straightforward upgrade. Out back, a UMI flip kit, shock relocation bracket, and factory leaf springs work together to produce the full 6" rear drop. UMI monotube shock absorbers — valved specifically for the squarebody platform — round out the system, delivering a balanced ride whether you're daily driving, hauling, or carving corners.

Key Features:

• 4.5" front drop via drop spindles and UMI lowering springs
• 6" rear drop via flip kit, shock relocation bracket, and factory leaf springs
• 1-3/8" tubular front sway bar for reduced body roll and improved cornering
• Three-way adjustable 1" rear sway bar for tunable handling balance
• UMI monotube shocks valved specifically for the squarebody platform
• Drop spindles accept stock GM brakes and wheel bearings — no brake upgrade required
• Minor drilling required for installation
• Made in the USA
• Power Tour, daily driver, and corner carver proven

The Stage 2 kit is the ideal solution for squarebody owners who want maximum drop with genuine performance gains. The heavy-duty tubular front sway bar and three-way adjustable rear sway bar work together to sharpen handling and reduce sway, keeping the truck planted through corners and on the highway.