Product Code: 5000-T

System T: 3.5″ or 5.5″ Monster Suspension with Rear Extreme 4-Link for 9″, 1966-77 Bronco

$5,399.95

Earn up to 5,400 DuffBucks.

(2 customer reviews)

These systems take our Long Travel Monster Suspensions all the way. Say goodbye to leaf springs and hello to our Extreme 4 Link Rear Suspension.

Our Extreme 4 link systems are for the Bronco enthusiast who wants to take their Bronco to the next level. Eliminate leaf spring wrap, u-joint breakage and experience unparalleled articulation and tire traction. We’ve been selling this proven kit since 2008 and in 2012 revised the 9” truss to work for 3.5 or 5.5” lifts offering a lower center of gravity. This system utilizes inboard and outboard shocks in the rear for maximum stability. Want to minimize body roll on and off the trail? Check out our complete bolt-in sway bar system designed specifically for our 9″ 4 link kits.

This extreme 4 link requires a 2″ body lift. Stretching your rear wheelbase with this system is no problem. Up to 2″ back without relocating your rear cross member. For a stock wheelbase up to 35″ tires, no cutting into the body is required.

Lower links are made with the same super beefy 2” heavy wall DOM as our Extended Radius Arms; tough enough to take any abuse from trail obstacles. How do we know? We test all our own products on our Bronco’s before we ever put them on the shelf!

Comes powder coated in Duff Signature Blue or Midnight Black and finished off with 1” rod ends for easy adjustment. A complete Bronco-specific system, ready to deliver amazing articulation and off-road stability.

Looking for a 4-Link system for your 1 Ton axles? Click here.

NOTE: Welding required. Custom Exhaust Required. Not recommended for vehicles that are driven regularly on the road or at high speeds without our sway bar, as the softer suspension can cause excessive body roll and contribute to a panic situation. Rear coils do not have the weight rating or capacity for towing or to carry significant loads.

Includes:

  • Progressive 3.5” or 5.5″ Rate Coil Springs
  • Stage 2 Shock Hoops
  • Stage 3 Extended Long Travel Radius Arms
  • Extended Length Brake Lines
  • E-brake cables
  • HD Front Bump Stops
  • Drop Pitman Arm
  • 14 piece Bushing Kit
  • HD Track Bar Drop Bracket
  • Regular or Full-width Axle Truss
  • Frame Brackets
  • Upper & Lower Links
  • Progressive Rear Coil Springs
  • Coil Towers with HD Lower Coil Retainers
  • Crossmember Shock Mount and 8 70/30 Shocks.
  • 2″ Lift Blocks Blocks for 5.5″ system

Note: SHOCK BOOTS ARE NOT INCLUDED. 2″ Body Lift required for installation.

No Extreme 4 link lift system would be complete without a rugged and heavy-duty steering system built by James Duff. For 5.5″ systems check out our Early Bronco Heim steer system here and our trac bar riser bracket here. For 3.5″ systems check out the Bumpsteer eliminator system here, the bs eliminator includes all the parts to correct your geometry for a 3.5″ lift.

Weight 370 lbs
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"

2 reviews for System T: 3.5″ or 5.5″ Monster Suspension with Rear Extreme 4-Link for 9″, 1966-77 Bronco

  1. leinster bronco times

    Excelente articulo. Muchas gracias, Un saludo

  2. 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.

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