The Bilstein B8 8112 (Zone Control) is a high-performance bolt-on coilover designed for off-road dominance and superior on-road comfort. This Front Left Corner Module features internal bypass technology with three compression zones and one rebound zone. The kit includes: 1x 8112 Series Bypass Shock Absorber (41-324172), 1x Performance Coil Spring, 1x Billet Aluminum Upper Mount, and 1x Zinc Plated Chassis Mount with hardware. It offers position-sensitive damping and a telescopic internal bump stop to prevent bottoming out. Lift height: 0.5-2.5 inches. Direct fit for Toyota 4Runner 2010-2023.