The Hellwig EZ‑990 Helper Spring kit for 2004–2008 Ford F‑150 (2WD/4WD, except Heritage Edition) adds up to 2,000 lb of level load capacity via a bolted, tunable helper spring. Constructed from heat‑treated ASTM 5160 alloy spring steel and supplied with heavy U‑bolts and plated components, the kit helps improve control when towing or hauling and can be adjusted to balance uneven loads.
Hellwig 04-08 Ford F-150 2/4WD EZ Level 990 Helper Spring - Up To 2000lbs