Synergy Dual Durometer Bushings (DDB) in a forged housings have all the benefits of Synergy's Dual Durometer Bushings in a forged housing package. These are available for all Synergy products that use a Johnny Joint or rod end. See table for applications and specs. May be compatible with other products. Features: Dual Durometer Bushings (DDB) feature a maintenance free, grease less design Housings are forged from high strength 1045 steel and treated for corrosion resistance Control arm bushings are self centering with 30 degrees of misalignment 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 Synergy products using a Johnny Joint or rod end Available complete with bushing installed installed Part # Description Mounting Width Bolt Size Shank SYN-4800-01 Lower Control Arm Joint 2.625" 9/16" / 14MM 1 1/4-12 LH SYN-4800-02 Dodge Lower Control Arm Joint 2.625" 5/8" / 16MM 1 1/4-12 LH SYN-4801-21 Upper Control Arm Joint 2.32" 9/16" / 14MM 1-14 LH SYN-4801-22 Jeep JK Rear Upper Control Arm Frame Side Joint 2.625" 9/16" / 14MM 1-14 LH SYN-4802-31 Jeep Track Bar Joint 1.60" 9/16" / 14MM 3/4-16 LH SYN-4802-32 Jeep Track Bar Joint 1.60" 1/2" / 12MM 3/4-16 LH SYN-4803-41 Dodge Track Bar Joint 1.60" 9/16" / 14MM 7/8-14 LH SYN-4803-42 Dodge Track Bar Joint 1.60" 5/8" / 16MM 7/8-14 LH SYN-4804-21 Dodge Front Upper Long Arm Joint 2.32" 9/16" / 14MM 1 1/4-12 LH SYN-4805-12 Jeep TJ Rear Upper Control Arm Joint 2.00" 10MM 7/8-14 LH SYN-4807-01 Jeep JK Front Lower Short Arm Frame Side Joint 2.625" 9/16" / 14MM 1 1/4-12 LH @ 6.3 DEG ANGLE SYN-4807-02 Jeep JL Front Lower Short Arm Frame Side Joint 2.625" 5/8" / 16MM 1 1/4-12 LH @ 6.3 DEG ANGLE SYN-4808-21 Jeep JK Rear Upper Short Arm Axle Side Joint 2.32" 9/16" / 14MM 1-14 LH @ 6.3 DEG ANGLE SYN-4810-01 13+ RAM Track Bar Joint 1.63 18MM 1-14 LH @ 12 DEG ANGLE SYN-4811-01 Jeep Track Bar Joint 1.60" 9/16" / 14MM 7/8-14 LH SYN-4812-21 Jeep Track Bar Joint 1.60" 9/16" / 14MM 7/8-14 LH @ 12 DEG ANGLE