Bilstein B8 5100 Monotube Suspension Shock Absorber 33-313146

Upgrade the suspension performance of your lifted truck or SUV with the Bilstein B8 5100 suspension shock absorber, part number 33-313146. Designed as a direct-fit replacement for select Toyota FJ Cruiser, Toyota 4Runner, and Lexus GX460 applications, this Bilstein shock absorber is engineered to improve ride quality, handling, and comfort while maintaining consistent performance on changing road surfaces. Its application-specific tuning helps provide controlled suspension response for light-truck use.
The B8 5100 features a 46mm monotube design that delivers consistent, fade-resistant damping in demanding driving conditions. A velocity-sensitive, digressive piston responds quickly to road variations, helping the shock absorber maintain tire contact and suspension control over rough pavement, uneven terrain, and changing loads. The smooth-body construction and non-adjustable damping design provide dependable operation without requiring manual tuning.
This Bilstein shock absorber uses a zinc-plated finish for added durability and includes a black bellows boot to help protect the shaft from road debris. It is configured with an eye-style lower mount and stem-style upper mount for direct installation on compatible applications. The shock has a 14mm shaft, an approximately 14.91-inch collapsed length, an approximately 23.03-inch extended length, and 8.12 inches of suspension travel. It does not include a reservoir or spring seat. Fitment includes select 2011–2014 Toyota FJ Cruiser models, 2012–2014 Toyota 4Runner models, and 2012–2014 Lexus GX460 models. Verify vehicle configuration and suspension lift requirements before ordering. This product contains a California Proposition 65 warning for cancer and reproductive harm.