SUBFRAME BOX FOUR

Rancho has developed a 4-inch performance suspension system for the 2011 and newer Chevrolet Silverado and GMC Sierra 2500HD 4WD models. This system accommodates up to 35-inch tires. The kit features a one-piece, reinforced subframe made from high-strength, low-alloy steel, CNC-machined extended cast steering knuckles for improved strength and reliability, and tubular aft braces. The design ensures no drivetrain or exhaust modifications are required for installation, allows the reuse of stock wheels, and maintains factory rack and pinion alignment specifications. The system is backed by a limited lifetime warranty and includes detailed installation instructions.