The Bilstein B8 8100 (Bypass) is a direct-fit, position-sensitive rebound shock absorber designed for lifted pickups and SUVs. This rear left shock features a dual-tube external bypass system for incremental damping adjustments, providing superior control and comfort during off-road high-speed tracking. It utilizes a 60mm remote reservoir for increased oil capacity and cooling. This is a high-performance upgrade focused on bottom-out control and durability. Components included in this unit: - Shock Absorber: 25-320442 - Reservoir Mounting Bracket Kit: 11-325243 - Installation Hardware Pack: B4-KT1-Z638A00