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🧾 Overview
The Bilstein B8 5100 Rear Shock is a proven performance upgrade for the Toyota 4Runner, designed to improve ride quality, stability, and off-road capability for both stock and lifted setups.
Built with Bilstein’s monotube gas-pressure design and digressive valving, this shock delivers consistent damping, better heat dissipation, and improved control compared to factory shocks—especially when running larger tires or added weight like armor and gear.
Unlike the front 5100s, the rear shocks are non-adjustable and tuned for stock height up to ~2" of lift, making them the perfect match for leveling kits or full suspension systems.
✔ Improves ride quality and stability over factory shocks
✔ Designed for stock to ~2" lifted setups
✔ Monotube design for fade-free performance
✔ Handles added weight (gear, armor, accessories)
✔ Direct-fit upgrade
🛠 Installation
- Direct bolt-on replacement for factory rear shocks.
- No spring compressor required.
- Estimated install time: ~1–2 hours
📌 Specs
📌 Key Features & Benefits
- Monotube Gas Design – Provides consistent damping and improved heat dissipation.
- Digressive Valving – Automatically adapts to road and trail conditions.
- Improved Load Handling – Better control with added weight (overland gear, armor).
- Direct Fit Replacement – No modification required for installation.
- Proven Reliability – One of the most trusted shock upgrades for Toyota platforms.
📘 Specifications
- Brand: Bilstein
- Product Type: Rear Shock Absorber
- Vehicle: Toyota 4Runner
- Years: 2003–2024
- Lift Range: 0–2"
- Shock Type: Monotube Gas Pressure
- Valving: Digressive (Self-Adjusting)
- Body Diameter: 46mm
- Finish: Zinc-Plated
- Installation Type: Bolt-On
- Sold As: Single
📦 What’s Included (What’s in the Box)
- Suspension Components
- (1) Rear Shock Absorber
🛡 Warranty
- Bilstein Limited Lifetime Warranty
⚠️ Fitment Notes
- Toyota 4Runner (2003–2024)
- Toyota FJ Cruiser (2007–2014)
- Lexus GX470 (2003–2009)
- Lexus GX460 (2010–Present)
⚠️ Fitment Notes
- ❗ Designed for 0–2" lift applications
- ❗ Non-adjustable rear shock
- ❗ Ideal pairing with front 5100 adjustable shocks
- ❗ Compatible with factory or aftermarket rear springs