Prothane 18-301-BL Rear Control Arm Bushing Kit Black Polyurethane 4WD

The Prothane 18-301-BL is a rear control arm bushing kit engineered as a high-performance polyurethane upgrade over factory rubber bushings for 1990–1995 Toyota 4Runner 4WD models. Worn or deteriorated OEM rubber bushings allow excessive control arm flex, which directly compromises caster and camber alignment settings and leads to vague, unpredictable handling. Prothane's precision-formed polyurethane eliminates that unwanted compliance, keeping your suspension geometry locked in and your alignment dialed.

Key Features:

• High-Performance Polyurethane Construction: Firmer than OEM rubber, resisting wear, oil, and weathering to dramatically outlast factory bushings
• Graphite-Infused Black Formula: The black colorway incorporates a small amount of graphite into the urethane compound, providing inherent anti-squeak properties
• Optimum Compliance Resistance: Minimizes control arm deflection under load, improving steering response, cornering stability, and overall vehicle control
• Accurate Alignment Retention: Maintains caster and camber settings under stress, preserving tire wear characteristics and handling consistency
• Precision Fitment: Molded to exact specifications for 1990–1995 Toyota 4Runner 4WD — a direct replacement for OEM bushings
• Includes Prothane Super Grease: Kit ships with grease for proper lubrication during installation — critical for noise-free, long-term performance
• Lifetime Warranty: Backed by Prothane's lifetime warranty against defects in materials and workmanship for the original purchaser
• Made in the USA

As a high-stress suspension component, proper installation is essential. Apply the included Prothane Super Grease thoroughly to each bushing during fitment to prevent squeaking and ensure full service life. These bushings are designed specifically for 4WD applications — 2WD models require a different part number.