The Jeep Comanche MJ (1986-1992) is a durable icon, but its factory unibody often can't withstand modern upgrades like suspension lifts and oversized tires, leading to flex, cracks, and wear across the frame. Our Basic Unibody Stiffener Kit provides a complete solution with 4 pairs of reinforcements: front (outer rails from bumper to lower control arm), center (outer and bottom from control arm to back cab mount), front bed (outer from cab to bed center), and rear bed (outer and bottom from bed center to rear). This full set welds along the unibody for enhanced structural integrity, support, and longevity in demanding conditions.

Customize the kit with 10-gauge cold rolled steel (for superior strength through work hardening and a refined finish) or 3/16-inch pickled and oiled steel (thicker, with a scale-free surface for easy welding and rust resistance). All sections are CNC-cut to preserve factory vents and bolt holes, and you can select square or round weld holes for installation ease. Bed sections offer long or short variants for perfect compatibility. Ideal for comprehensive upgrades or rust repairs in salty climates, welding is essential with potential light grinding for fitment.

Proudly built by T-M Fab, your expert in Jeep fabrication for reliable, trail-ready performance.

• Full Unibody Coverage: Includes 4 pairs of stiffeners for comprehensive reinforcement: front (bumper to control arm), center (control arm to cab mount), front bed (cab to bed center), and rear bed (bed center to rear)—strengthens outer and bottom rails to handle lifts, oversized tires, and off-road demands beyond factory design.
• Bed Length Customization: Options for long or short bed configurations in the bed sections, ensuring a tailored fit for your specific Jeep Comanche MJ build.
• Precision Engineering: CNC-cut to retain factory vents and bolt holes across all sections for seamless integration without major modifications.
• Material Choices for Durability: Available in 10-gauge cold rolled steel or 3/16-inch pickled and oiled steel for the entire kit—select based on your needs for strength, thickness, and surface quality.
• Cold Rolled Steel Benefits: Processed at room temperature for work hardening, providing higher strength, hardness, and a smoother finish ideal for high-load precision applications.
• Pickled and Oiled Steel Benefits: Hot-rolled base with acid pickling to remove mill scale (superior to standard A36), plus oil coating for rust prevention—offers a cleaner surface for better welding, painting, and ductility during forming.
• Weld Hole Options: Choose square or round weld holes kit-wide to match your welder's preference for efficient, user-friendly installation.
• Rust Repair and Longevity: Perfect for salted-road environments, aiding in rust patching and prevention throughout the unibody to extend your Comanche's lifespan.
• T-M Fab Quality: Engineered for Jeep Comanche MJ (1986-1992)—welding required, with possible minor grinding; visit t-mfab.com for more MJ upgrades and individual parts.