Features:

  • Synergy Dual Durometer Bushing (DDB) Series
  • Feature a maintenance free, grease less design.
  • Self centering with 30 degrees of misalignment. (4320-01, 4320-02, 4320-03)
  • Outer "soft" durometer acts as bushing cushion and flex material.
  • Inner "hard" durometer lining acts as the bearing surface to allow free floating inner sleeve to rotate. Provides for a maintenance free "zero bind" bushing.
  • Internal bushing ring separates inner and outer materials to prevent inner sleeve gaping at extreme flex.
  • Direct replacement available for aftermarket control arms using OEM Clevite style lower control arm bushings.
  • Bushings available for all suspension components made by Synergy MFG as well as many other companies.
  • Bushings are sold complete with inner sleeve installed.
  • Check out the Video!

IMPORTANT: Dual Durometer Bushings (DDB) are not a replacement for Synergy products that originally came with Johnny Joints. These bushings are only replacements for Synergy products that came with Dual Durometer Bushings (DDB). Please call/email for more information on specific products. 805.242.0397 / support@synergymfg.com

        Housing
Part # Description Fitment Mounting Width Bolt Size Housing Part # Length OD Wall ID 
4320-01 LOWER CONTROL ARM BUSHING 8033803680468047805180528153815482318551-018563-018585, 8232 2.618" 9/16" / 14MM 4408-01 2.000" 2.625" 0.188" 2.249"
4320-02 DODGE LOWER CONTROL ARM BUSHING  8551-028563-028583-028851-01 2.618" 16MM 4408-01 2.000" 2.625" 0.188" 2.249"
4320-03 DODGE LOWER CONTROL ARM BUSHING 8551-03, 8563-038583-03 2.618" 18MM 4408-01 2.000" 2.625" 0.188" 2.249"
4321-01 JEEP FRONT UPPER CONTROL ARM BUSHING 80538853-01 2.000" 12MM 4410-01 1.500" 2.500" 0.188" 2.124"
4321-02 JEEP UPPER CONTROL ARM BUSHING 8151, 8152 2.000" 10MM 4410-01 1.500" 2.500" 0.188" 2.124"
4321-03 FRONT UPPER CONTROL ARM BUSHING 8035 2.000" 1/2" 4410-01 1.500" 2.500" 0.188" 2.124"
4322-01** UPPER CONTROL ARM BUSHING 803880548553-01 2.360" 9/16" / 14MM 4407-01 1.750" 2.500" 0.188" 2.124"
4322-02 UPPER CONTROL ARM BUSHING   2.618" 9/16" / 14MM 4407-01 1.750" 2.500" 0.188" 2.124"
4323-01 JEEP TRACK BAR BUSHING 806280688075-0280878233-03 1.600" 9/16" / 14MM 4402-01 1.375" 1.875" 0.188" 1.499"
4323-02 JEEP TRACK BAR BUSHING 8155-01, 8156 1.600" 12MM 4402-01 1.375" 1.875" 0.188" 1.499"
4324-01* DODGE TRACK BAR BUSHING 8550-018550-02 1.600" 9/16" / 14MM 4409-01 1.375" 2.000" 0.188" 1.624"
4324-02* DODGE TRACK BAR BUSHING 8550-01 1.600" 5/8" / 16MM 4409-01 1.375" 2.000" 0.188" 1.624"
4326-02 FRONT UPPER CONTROL ARM BUSHING 8012-158012-16 2.000" 12MM NA NA NA NA NA
4327-01 TRACK BAR BUSHING 8075-028862-01, 8875-01 1.600" 9/16" / 14MM 4409-01 1.375" 2.000" 0.188" 1.624"

Notes:
  • Parts in red do not yet come with these bushings.
  • 4320-01, 4320-02 and 4320-03 have nylon outer shell.
  • 4324-01 and 4324-02 replacement bushings are only for 8550-01 and 8550-02 Track Bars who came with these bushings. If upgrading from 4306-01 polyurethane bushings, Dual Durometer Bushings (DDB) can be retrofitted one of two ways depending on bolt size:
    - 94-07 trucks with 14mm or  9/16" bolt: Replace with 4323-01 Dual Durometer Bushing (DDB) or use 8529-01 Retrofit Kit.
    - 08-13 trucks with 16mm or 5/8" bolt: Must use 8529-01 Retrofit Kit.
  • 8550-01 track bars built 5/19/2015 and newer and 8550-02 track bars built 2/13/2015 and newer require replacement bushings 4324-01 or 4324-02 depending on bolt size. 
  • **4322-01 bushing is not a retrofit for 8054 that came with Poly bushing halves. Correct replacement bushing is 4303-01 bushing halves.

Specifications:

 

Part # A
(MOUNTING
WIDTH)
B
(SHELL LENGTH)
C
(OD)
D
(SLEEVE ID)
4320-01 2.618 2 2.267 0.563
4320-02 2.618 2 2.267 0.638
4320-03 2.618 2 2.267 0.717
4321-01 2 1.75 2.135 0.505
4321-02 2 1.75 2.135 0.402
4322-01 2.32 1.75 2.135 0.563
4323-01 1.6 1.25 1.508 0.563
4323-02 1.6 1.25 1.508 0.525
4324-01 1.6 1.25 1.657 0.563
4324-02 1.6 1.25 1.657 0.638

 

 

 

(Syn-4320-01)

SKU Syn-4320-01
Brand Synergy
Shipping Weight 0.4900kg
Shipping Width 0.010m
Shipping Height 0.010m
Shipping Length 0.010m
Shipping Cubic 0.000001000m3