Rock Rail Nerf Bar for 2018-2021 Jeep Wrangler JL Unlimited (4-Door), Black Rampage Drivetrain & Differentials - Transfer Case Housings 4 inch | Internal Dimensions:

4 inch | Internal Dimensions: 11

1969-1991 GMC Suburban 1/2 and 3/4 ton 4WD (w/2 inch suspension lift - Rear)

Rear 3 inch blocks replace factory 1 inch blocks for 2 inch rear lift

Installation hole dimension: Diameter 0

Tucks tight to the frame

Rock Rail Nerf Bar for 2018-2021 Jeep Wrangler JL Unlimited (4-Door), Black Rampage Drivetrain & Differentials - Transfer Case Housings 4 inch | Internal Dimensions:Finally, a rock guard solution that looks as great on the road as it does off the road! The Rampage Rock Rail is a modular system that offers Jeep owners a choice of a double or single step rail that can quickly be removed, leaving the rock rail base to protect the truck body when hitting the trails. The revolutionary modular Rock Rail system is constructed of fully welded 3mm thick mild steel with a heavy textured black powder coated finish. Protect