These components are predominantly made in the USA and are primarily for the off road aftermarket.
. These bushings are only replacements for Synergy products that came with Dual Durometer Bushings (DDB);California Residents: WARNING Synergy Manufacturing Front Upper Control Arm Dual Durometer Bushing, 10MM Bolt, 2. In addition to suspension systems, Synergy also manufactures a complete line of heavy duty steering components, axle upgrades, skid plates, and other related products that dramatically improve vehicle on and off road capability, performance, and appearance.