- 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
Part # Description Fitment Mounting Width
(A)Bolt Size (D) OD
(C)Housing
Part #4320-01 LOWER CONTROL ARM BUSHING 8033, 8036, 8046, 8047, 8051, 8052, 8153, 8551-04, 8154, 8231,
8551-01,
8563-01, 8585, 82322.618" 9/16" / 14MM 2.249" 4408-01 4320-02 DODGE LOWER CONTROL ARM BUSHING 8551-02, 8563-02, 8583-02, 8851-01 2.618" 16MM 2.249" 4408-01 4320-03 DODGE LOWER CONTROL ARM BUSHING 8551-03, 8563-03, 8583-03 2.618" 18MM 2.249" 4408-01 4320-04 BRONCO REAR CONTROL ARM BUSHING 7052-01, 7054-01 74MM 16MM 2.249" 4408-01
4320-05 BRONCO REAR CONTROL ARM BUSHING 7052-01, 7054-01 70MM 16MM 2.249" 4408-01
4321-01 JEEP FRONT UPPER CONTROL ARM BUSHING 8053, 8853-01 2.000" 12MM 2.124" 4410-01 4321-02 JEEP UPPER CONTROL ARM BUSHING 8151, 8152 2.000" 10MM 2.124" 4410-01 4321-03 FRONT UPPER CONTROL ARM BUSHING 8035 2.000" 1/2" 2.124" 4410-01 4322-01** UPPER CONTROL ARM BUSHING 8038, 8054, 8854-01, 8553-01 2.360" 9/16" / 14MM 2.124" 4407-01 4322-02 UPPER CONTROL ARM BUSHING 8038 2.618" 9/16" / 14MM 2.124" 4407-01 4323-01 JEEP TRACK BAR BUSHING 8062, 8068, 8075, 8087, 8233-03 1.600" 9/16" / 14MM 1.499" 4402-01 4323-02 JEEP TRACK BAR BUSHING 8155-01, 8156 1.600" 12MM 1.499 4402-01 4324-01* DODGE TRACK BAR BUSHING 8550-01, 8550-02 1.600" 9/16" / 14MM 1.624" 4409-01 4324-02* DODGE TRACK BAR BUSHING 8550-01, 1.600" 5/8" / 16MM 1.624" 4409-01 4326-02 FRONT UPPER CONTROL ARM BUSHING (AXLE SIDE) 8012-15, 8012-16, 8012-18 2.000" 12MM 1.782" 8012-18 * 4327-01 TRACK BAR BUSHING 8075-02, 8862-01, 8875-01, 8550-11 1.600" 9/16" / 14MM 1.758" 4409-01 4327-02 FORD TRACK BAR BUSHING 8675-01 1.732" 20mm 1.758" 8675-01* 4327-03 Dodge 2500
2008.5-20138550-11 1.6 14mm 1.758" 4327-04 Dodge 2500 2008.5-2013 8550-11 1.75 5/8 /
16mm1.627" 4409-01 4328-01 TRACK BAR BUSHING 8704-01 1.63" 18MM 1.875 4810-01
*Housing only available as part of 8675-01
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.
- *Housing only available as part of 8012-18 kit
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 |
4321-03 | 2 | 1.5 | 2.135 | 0.505 |
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 |
4327-02 | 1.732 | 1.375 | 1.758 | 20mm |
4328-01 | 1.6 | 1.41 | 1.887 | 0.717 |