Frame Stiffeners For Jeep XJ

Frame Stiffeners for Jeep XJ Cherokee

Reinforce your XJ’s unirails for long arms, crawling, and serious off-road use.

We’ve been making these frame stiffeners for over a decade, with more than 1,500 sets in use on trail rigs and race builds alike. Designed for the Jeep XJ Cherokee, these stiffeners weld directly to the factory unibody rails and are a must-have if you're adding long arms, a belly skid, or just want to stop the body from flexing like a soda can.

Unlike others that stop at the edge of the floor, these run 1" up onto the floor pan to eliminate stress risers and spread out the load. That extra coverage goes a long way in keeping your unibody intact — especially if you’re wheeling hard or running high-speed desert lines. The flat section near the crossmember makes adding a skidplate simple — just weld it up and use a jack to shape it tight. Perfect upgrade for Crawlers, Jeepspeed builds, and daily-driven trail rigs alike.

Key Features

• Part Number: R1259
• Fits Jeep XJ Cherokee (1984–2001)
• 3/16" steel construction
• Extends 1" onto floor pan for added strength
• Designed to support long arm kits, skidplates, and serious off-road abuse
• Welding required

What's Included

• (2) Frame stiffener plates — driver and passenger sides
• Sold in pairs

Note

Welding required. These stiffeners are designed for the Jeep XJ unibody rails and extend 1" onto the floor for increased load distribution. Ideal for long arm suspension setups and skidplate integration. Always prep and clean the frame before welding.