4-inch Lift Leaf Springs Kit, 78-79 Bronco, 73-79 Ford F150 4WD SKU: 791130

Rear Leaf Springs for 4-inch Lift | 78–79 Bronco & 73–79 Ford F-150 4x4

Built for full-size Broncos and F-150s that don’t back down, the Flex-Master 4-inch leaf spring kit from WILD HORSES gives your rear suspension the strength, flex, and function it needs to handle serious off-road abuse. Designed with trail and rock duty in mind, this kit includes everything you need—seven-leaf progressive springs, urethane bushings, and our extreme-duty U-bolt kit—all engineered to work together under the kind of stress factory parts were never meant to handle.

• Fits 1978–79 Ford Bronco & 1973–79 F-150 4x4 – Full-size trucks only, rear suspension.

• 4-inch lift height – Ideal for off-road setups with bigger tires and added clearance.

• WILD HORSES Flex-Master 7-leaf springs – Berlin eye design with upgraded 7/16" center pins for added strength.

• Progressive-rate leaf pack – Smooth ride on the road with serious articulation off-road.

• UHMW tip inserts & galvanized liners – Reduce friction and promote clean, controlled movement.

• Double-wrap front spring eye – Safety and strength where it matters most.

• Flat spring pad contact surface – Prevents preload and aligns perfectly with your axle.

• Extreme-duty U-bolt kit included – Zinc-plated, edge-routed plates prevent spring damage and axle shift.

• Urethane bushings included – Adds long-lasting performance and easier installation.

Take your 78-79 Bronco or 73-79 Ford truck suspension to the next level with our rear leafs - for serious off-roading, smooth travel, and trail-tested strength.