QA1 4-6” Lowering Kit – Single Adjustable w/ Spindles | 14-18 Silverado/Sierra 1500 4WD

QA1 4-6” Lowering Kit w/ Spindles – Single Adjustable | 2014–2018 Silverado / Sierra 1500 4WD

Complete front and rear suspension system designed to deliver an aggressive lowered stance while maintaining proper suspension geometry, ride quality, and daily drivability for 4WD trucks with aluminum or stamped steel control arms.

✔ Want maximum performance and tuning control? Upgrade to the Double Adjustable version (LK22).

✔ Includes drop spindles for proper suspension geometry and improved ride quality compared to coilover-only kits.

Performance & Ride Quality

QA1 Pro Coil system improves ride quality and handling while allowing simple rebound adjustment to fine-tune comfort and performance for street-driven trucks.

Ride Height Range

Front: 3–5” drop (with included spindles)
Rear: 4–6” drop with adjustable rear kit

Heavy-Duty Design

Engineered for modern truck loads with upgraded shocks, polyurethane bushings, and a 1” chromoly T-bar for long-term durability and daily use.

Rear Drop System

Includes heavy-duty shackles and hangers made from powder-coated steel to ensure strength, corrosion resistance, and long-lasting performance.

Installation

Fully bolt-in system designed for straightforward installation with no cutting or fabrication required.

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 proper alignment when lowered over 2.5”

Specifications