American Automotive Compatible with 1999+ Silverado Sierra 1500 3.5'' Rear Suspension Lift Steel Blocks + Extra Long 14'' Square Leaf Spring Axle U Bolts for 2WD 4WD

*FITMENT: 1999-2021 GM Silverado Sierra 1500 2WD/4WD

*CONTENTS: 2x 3.5" Steel tapered lift blocks with 4x 14" OEM grade steel square bend u-bolts, hi-nuts and security spring washers.

*SPECIFICATIONS: U-Bolts are 14"x 2.5 x 9/16"; Blocks are 2x 5"L x 2.5"W x 3.5"H; 9/16th Pin

*TECHNICAL NOTES: A wheel alignment is recommended; Retighten u-bolts after the first 500 miles