Hellwig EZ-990 Helper Spring Kit for Select 1999-2007 Chevrolet Silverado/GMC Sierra 1500 (2000lb Capacity) - 986

Fits select 1999-2007 Chevrolet Silverado 1500 and GMC Sierra 1500 models, including Classic, Hybrid, SS, and K1500 variants.

The Hellwig EZ-990 medium-duty helper spring kit is engineered to provide additional rear-end support for vehicles that frequently haul light to medium loads or tow small trailers. By reinforcing the factory leaf pack, these helper springs improve vehicle control, reduce sag, and enhance stability without permanently hardening the ride. Each kit is manufactured in California using heat-treated ASTM 5160 alloy spring steel for long-term durability and consistent performance.

This system features a fully adjustable bolt-on design. Using the included heavy-duty U-bolts and hardware, installers can tune the tension to match specific load requirements or even adjust them independently to compensate for uneven side-to-side weight distribution. The components are finished with a combination of powder coating and plating to resist corrosion in harsh environments.

• Manufacturer Part Number: 986
• Level load carrying capacity: Up to 2,000 lbs
• Material: Heat-treated ASTM 5160 alloy spring steel
• Hardware: Heavy-duty powder-coated and plated U-bolts and brackets
• Adjustment: Independent side-to-side tunability
• Installation: Simple bolt-on with common hand tools; no drilling required
• Warranty: Limited Lifetime Warranty