Product Description:
QA1 4-6” Lowering Kit w/ Spindles – Double Adjustable | 2014–2018 Silverado / Sierra 1500 4WD
Premium front and rear suspension system engineered for maximum performance and adjustability on 4WD trucks. Designed to deliver an aggressive lowered stance while maintaining proper geometry and drivability.
✔ Built for enthusiasts who want total control over ride quality and handling performance.
✔ 3–5” Front Drop (Includes Spindles)
✔ Double Adjustable Shocks (Compression & Rebound)
✔ Designed for 4WD Trucks (Stamped/Aluminum Arms)
✔ Complete Front & Rear Performance System
✔ Independent compression and rebound adjustment gives unmatched tuning capability for street or performance driving.
Performance & Ride Quality
QA1 Pro Coil double adjustable system transforms handling and ride quality, allowing precise tuning for comfort, load control, or aggressive driving conditions.
Ride Height Range
Front: 3–5” drop (with included spindles)
Rear: 4–6” drop with ½” incremental adjustment
Heavy-Duty Design
Engineered with upgraded shocks, polyurethane bushings, and a 1” chromoly T-bar to withstand truck loads and real-world driving demands.
Rear Drop System
Heavy-duty shackles and hangers constructed from powder-coated steel ensure long-lasting durability and consistent performance.
Installation
Fully bolt-in system designed for a clean and straightforward installation.
Warranty
Backed by QA1’s lifetime warranty (registration required).
Fitment Notes
- Fits 2014–2018 Silverado / Sierra 1500 4WD
- Designed for trucks with stamped steel or aluminum control arms
- Includes front drop spindles
- Requires minimum 18” wheels for proper clearance
- Axle U-bolts not included
- Does NOT fit 1500HD models
- Offset upper control arm bushings (ACDelco 45K0201) may be required for alignment when lowered over 2.5”
Specifications
| Kit Type | Lowering Kit |
| Drivetrain | 4WD |
| Shock Valving | Double Adjustable |
| Includes Drop Spindles | Yes |
| Emission Code | 4 |
| Prop 65 Warning | Yes |
