Includes CNC-machined aircraft-grade billet Aluminum front top hat replacement lift spacers and heavy-duty OEM style cast iron rear blocks. Includes tubular steel upper control arms with adjusted ball joint pivot angles housing a heavy-duty ball joint Allows for up to a 32.5x11.50" tire on up to +18 offset wheels. (285/70-17) Maintains the factory ride, handling and suspension geometry Unmatched curb-appeal and rugged mid-size truck capability delivered in an affordable yet innovative Smart Suspension Technology "no-cut" lift kit. NOTE: Use of Auto 4 Hi feature not recommended. NOTE: For gasoline engine applications only. Kit not recommended for diesel applications