Hellwig Leaf Helper Spring – EZ-990 Helper Spring Kit. EST, MON to FRI. Suspension > Suspension, Springs and Related Components > Leaf Helper Spring. EZ-990 Helper Spring Kit. Up To 2000 lbs. For Air Bags On Lifted Vehicles Using Non-Tapered Lift BlockUse PN[4822] Spacer For A 2 in. Rear Lift AndPN[4824] Spacer For A 4 in. Hellwig Products has been manufacturing high quality, innovative load control and sway control solutions for domestic and foreign trucks, RV’s, muscle cars, classic cars and fleet vehicles since 1946. No matter what your application is, Hellwig Products has a way to make it handle better or tow easier.