Flex-Master 4-inch Lift Kit w/Bilstein 5100 Shocks, 78-79 Ford Bronco SKU: 790003NET

Flex-Master 4-inch Suspension Lift Kit | 1978–79 Ford Bronco

Transform your 1978–79 Ford Bronco into a trail-ready, street-capable beast with our Flex-Master 4-inch Suspension Lift Kit. This complete system combines our Flex-Master progressive leaf springs, All Terrain coil springs, and premium Bilstein 5100 shocks to deliver unmatched flexibility, strength, and ride comfort—on and off the road. Includes everything you need: urethane bushings, C-bushings, heavy-duty U-bolts with plates, shock boots, and more for a comprehensive, reliable suspension upgrade.

Kit Includes:

• Flex-Master 4" Leaf Springs (Pair) – 7-leaf progressive springs with Berlin eyes, heavy-duty 7/16" center pins, and UHMW tip inserts for strength and flex

• All Terrain 4" Coil Springs (Pair) – Smooth ride, balanced for daily driving and off-road use; available in Red, Blue, or Black

• Bilstein 5100 Series Shocks (Set of 4) – Premium monotube shocks with 46mm pistons and patented digressive valving

• Heavy-Duty U-Bolt Kit with Plates – Secure axle retention for rear spring installation

• Polyurethane Spring & Shackle Bushings – Long-lasting and durable for rear suspension

• Polyurethane Strut/Radius Arm Bushings – Maintains alignment and improves ride stability

• Polyurethane Trac Bar Bushing – Restores tight steering feel and handling

• C-Bushings – Properly re-center caster angle after the lift

• Shock Boots (Set of 4) – Protects shock rods and seals from dirt, debris, and damage

Superior Flex & Articulation: The Flex-Master 4-inch Suspension Lift Kit offers a perfect balance of strength, flexibility, and ride comfort for your 1978–79 Ford Bronco. Flex-Master rear springs and All Terrain coil springs deliver superior flex and suspension articulation, ensuring your Bronco can handle the toughest off-road trails while maintaining smooth, controlled ride quality on the street.

Includes Bilstein 5100 Series Shocks: The inclusion of Bilstein 5100 shocks further enhances comfort and stability with advanced monotube technology. Bilstein 5100's are the go-to shock for many of the top Bronco builders.

Urethane Bushings Reduce Noise & Increase Durability: The urethane bushings and precision-fit components improve steering response and suspension control, making your Bronco feel tighter and more capable both on and off the pavement. Our urethane bushings are graphite-impregnated to reduce squeaking and last much longer than traditional rubber bushings.

Custom Coil Spring Colors: With coil springs available in your choice of Red, Blue, or Black, you can even customize the appearance to match your build.

Built for the street and trail—this Flex-Master 4" lift kit for 78–79 Broncos delivers flex, strength, and a ride you can actually enjoy every day.