Bilstein 36-281831 B12 Rear Lift Coil Springs for03-24 Toyota 4Runner/FJ Cruiser

Vehicle Fitment

• 2003-2024 Toyota 4Runner (All Trims, RWD/4WD)
• 2007-2014 Toyota FJ Cruiser (All Trims, 4WD)
• 2010-2023 Lexus GX460 (All Trims, RWD/4WD)

Features

• Rear coil spring lift kit engineered for enhanced load-carrying capacity
• Approximately 1.5" rear lift on 4WD models; up to ~2.2" on RWD under heavy load
• B12 (Special) design tuned for improved suspension dynamics
• Durable high-tensile steel with protective black powder coat finish
• Hydraulic preset and shot peened for long-term fatigue resistance
• Optimized for vehicles carrying constant heavy weight (up to ~400 lbs)
• Direct replacement - no major modifications required
• Improves stability with lifted rear stance under load

Specifications

• Brand: Bilstein
• Part Number: 36-281831
• Series: B12 (Special)
• Position: Rear
• Rear Lift Height: ~1.5" (4WD typical) / ~2.2" (RWD or heavy load)
• Material: High-tensile steel with black powder coat
• Rear Main Spring Rate: ~223 lb/in
• Quantity: Pair (Left + Right)
• Warranty: Limited Lifetime Warranty

Included Components

• 2x Rear coil springs (left & right)

Product Description

The Bilstein 36-281831 B12 (Special) rear lift coil springs are designed to raisethe rear ride height and improve load-handling capability on compatible Toyotaand Lexus SUVs. These springs are specifically tuned for heavy load conditions,providing additional rear lift and support when carrying constant weight suchas gear, cargo, or accessories. They are built to withstand the rigors ofoff-road use while maintaining stability and performance for daily driving.

Made from high-quality, high-tensile steel and finished with a durable powdercoat, these springs are hydraulically preset and shot peened to resistfatigue and maintain consistent performance over time. The direct-fit designmeans installation replaces the factory rear coil springs with minimal fuss,making this a straightforward upgrade for vehicles needing extra rear lift andload capacity. When paired with compatible Bilstein rear shocks, they helpdeliver a balanced ride and improved handling under load.