Replace your factory u-bolts with these zinc plated corrosion resistant Tuff Country 17858 Silverado/Sierra 3500/3500HD u-bolts. Designed specifically for lifted vehicles. This kit includes (4) u-bolts along with nuts and washers.
Details:

• Rear Axle U-Bolt Kit
• Zinc plated to resist corrosion
• (4) U-bolts, nuts and washers
• Designed specifically for Lifted vehicles
• Made In The USA
• Sold As A Kit

Fits:

• 2001-2010 Chevrolet Silverado 3500/3500HD 4WD (Lifted w/4 inch blocks)
• 2001-2010 GMC Sierra 3500/3500HD 4WD (Lifted w/4 inch blocks)

Tech Specs:

• Bolt Diameter: 5/8 Inch
• Inside Diameter: 2.75 Inches
• Length: 16.5 Inches
• Bend Type: Square