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The Timbren Suspension Enhancement System for 1990 International 4600 rear suspensions uses rubber spring cushions to absorb road shocks and automatically adjust to uneven loads, reducing sag and squatting during towing and hauling. The bolt-on kit requires no airlines or drilling, improving handling and stability. This rear kit supports up to 12,000 lbs and includes Timbren’s low-maintenance rubber‑spring design with a lifetime warranty.
Timbren 1990 International 4600 Rear Suspension Enhancement System
