Directly Bolts in to Factory Holes. (only one small hole needs to be drilled to place air fill valve). Provides up to 5000lbs of Leveling Capacity. Easily add or remove air same as you would a tire. Never exceed more than truck manufacturers maximum load recommendations. 2001 – 2010 Chevy/GMC 2500/2500HD Trucks with 8 Lug Wheels. Will Not Fit Trucks with Rear Sway Bar. 2 – Standard 2500 lb Air Springs. Mounting Brackets with Hardware. Approved Air Line with Fittings and Schrader Valve. We offer sophisticated products at a high technological level, with the highest possible quality and the most favorable price. With these parts you can replace your defective parts simply plug and play. 24 months without mileage limitation. Please compare carefully with Photos or OE number before purchasing the part. Please leave us your full name, your telephone number and detailed address when ordering. We try our best to pack the products as good and safe as possible, so they always arrive in a good condition.