System T: 3.5″ Or 5.5″ Monster Suspension With Rear Extreme 4-Link For 9″, 1966-77 Bronco

This high-performance suspension system includes a fully integrated Extreme 4-Link design and offers significant upgrades, featuring durable components that maximize stability and resilience both on and off the trail.

Description

Equipped with either 3.5″ or 5.5″ progressive rate coil springs, this suspension system ensures optimal ride quality and handling. The design incorporates a complete set of enhanced components, focusing on ease of installation and robust performance, making it an excellent addition to your Bronco.

Key components include:
– Progressive 3.5″ or 5.5″ Rate Coil Springs
– Stage 2 Shock Hoops
– Stage 3 Extended Long Travel Radius Arms
– Extended Length Brake Lines
– HD Front Bump Stops
– Polyurethane C-Bushings
– Banjo or Centurion Truss
– Frame Brackets
– Upper & Lower Links
– Progressive Rear Coil Springs
– Coil Towers with HD Lower Coil Retainers
– Crossmember Shock Mount with 8 MS2020 or 70/30 Shocks
– 2″ Lift Blocks for 5.5″ System

Please note: Shock boots are not included, and a 2″ body lift is required for installation.

Installation requires welding for the rear truss, frame brackets, and coil towers; therefore, hiring a professional is recommended if you lack experience in this area. Additionally, a modification of your exhaust is necessary as no off-the-shelf exhaust system pairs with James Duff 4-Link systems. Custom exhaust systems, such as our shorty headers, are recommended.

Shipments are made via freight or ground carrier and may incur a 3% cancellation fee if canceled before shipping.

For optimal handling and stability during on-road drives, our optional sway bar system for the 9″ 4-Link kit should be considered. Notably, this Extreme 4-Link suspension is designed to accommodate a stock wheelbase capable of handling up to 35″ tires without requiring any body cutting.

With a proven track record since 2008, this kit has undergone design enhancements to lower the center of gravity and improve handling. Each unit is powder-coated in either Duff Signature Blue or Midnight Black, featuring 1″ rod ends for easy adjustments to suit your ride quality preferences.

Features & Benefits:

  • Made in the USA
  • Extreme 4-Link Rear Suspension System
  • Extended Radius Arms
  • MS2020 or 70/30 Shocks
  • Optional James Duff Rear Sway Bar for 4-Link
  • Options available:
  • 4-Link leveling kit
  • Additional Rear MS2020 Shocks for 500+ horsepower
  • Color-matched C-Caps
  • 2″ body lift optional
  • FAQ:
  • Can I install this in my driveway or garage?
  • Yes, although it requires several tools and advanced mechanical skills, including welding and alignment.
  • Do I need to purchase driveshafts?
  • Yes, adjustments to the front axle’s caster may necessitate a high-angle, long-travel front driveshaft.

Technical Specs:

  • Compatibility:
  • 1966-1977 Early Bronco

Additional information

Choose Model Year

1966-1975, 1976-1977

Choose Color

Duff Signature Blue, Midnight Black

Choose Lift Height

3.5" Lift, 5.5" Lift

Choose Truss

Standard 9", Full Width 9"

Reviews

  1. David N Meek

    I did a lot of research before buying th3 3.5 inch system. Including using available four link calculators with estimated measurements based on 92 inch wheel base and 35 inch tires. For the cost and time savings this is almost a no brainer. After installing the system I ran the measurements again. A good anti squat of 73-75% for the multi purpose driving I do. After working out issues that were pre-existing on my Bronco (too much pos. camber not enough positive caster and way too much tie rod roll)not it now rides and performs better off and on road than it has since I purchased it almost 20 years ago. I’m very happy I bought this system.

  2. leinster bronco times

    Excelente articulo. Muchas gracias, Un saludo

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