3349 | Superlift 4.0 inch Block Kit (1973-1987 K20 Pickup, 1973-1991 Suburban K20 4WD)

This is a 4.0” rear lift block kit for specific models

What does it include?
2 cast iron blocks, four u-bolts, all nuts and washers needed for installation
Detailed instruction manual walking you step-by-step through the lift kit installation procedures suitable for do-it-yourselfers (DIY) or professional installation

Superlift rear block kits help distribute the weight of your cargo and improve the towing performance of your truck. They'll also give your rear a little lift to bring it back to the proper ride height.

Superlift's block kits include two cast iron lift blocks and four U-bolts with factory type Hi-nuts and flat washers. The blocks are cast from Class 30 Gray Iron, the same material used by vehicle manufacturers for their spacer blocks. Our U-bolts are manufactured from low allow, high strength steel. The anti-corrosion finish is either Zinc or E-coat