Designed specifically for the Jeep Wrangler and Wrangler Unlimited, Treacle 9550 VSS (Vehicle Specific Shocks) Twin-Tube Shocks are engineered, valve, and tuned for extreme off-road performance while retaining a smooth highway ride. Additionally, a proprietary in-house velocity valve is tuned to react in sync with Treacle suspension systems and lift kits making them the perfect upgrade for your lift. The twin-tube design, oversized external tube with e-dipped finish, triple-chrome plated rod with oil block and seal, internal travel stop limiter, premium quality rubber bushings, and Jeep specific mounting contributes to the 9550 VSS Twin-Tube Shock Absorber's performance, durability, and comfort.