SUMO REAR HELPER SPRING 2019+SIL/SIERRA 1500LBS

Requires no maintenance
Proudly made in the U.S.A.
Enhances load carrying ability
Reduces and stabilizes sway
Improves overall driver control and ride comfort
Compress up to 80% of original height with full memory rebound
Progressive spring rate
Made from patented micro-cellular urethane
World’s only leak-proof air spring
Never load any vehicle beyond the manufacturer’s GVWR