Rear Spring Insulator Bushing & Leaf Spring Seat Cushion - 4PCS, Compatible with Ford F250 F350 F450 F550 Super Duty 1988-2025, Replaces E8TA-5A978-AA, E8TZ5A978A

Upgrade your Ford Super Duty’s rear suspension with Rear Spring Insulator Bushings and Leaf Spring Seat Cushions. Engineered to meet or exceed OEM standards, this 4-piece set delivers durability, comfort, and reliability for your heavy-duty truck. Product Details: Fitment: Compatible with Ford F250, F350, F450, F550 Super Duty (1988-2025). OEM Part Numbers: E8TA-5A978-AA, E8TZ5A978A. Material: High-grade rubber formulated for resilience and weather resistance. Quantity: 4 pieces (complete set for rear suspension). Features: Superior Shock Absorption: The robust rubber construction cushions impacts from bumps and uneven terrain, reducing stress on suspension parts and enhancing ride smoothness. Noise Elimination: By isolating metal components, these bushings prevent grinding and clunking sounds, ensuring a quiet cabin even on rough roads. Long Service Life: Resists cracking, deformation, and oil/chemical exposure, maintaining performance through extreme temperatures and heavy loads. Easy Install: Direct replacement design allows for quick installation with basic tools. Enhanced Safety: Stabilizes the leaf spring system, improving vehicle control, reducing body roll, and supporting optimal tire contact with the road. Package Includes: 4 x Rear Spring Insulator Bushings/Seat Cushions.

• Perfect Fit & Broad Compatibility: Specifically designed for Ford Super Duty models F250, F350, F450, and F550 from 1988 to 2025. Directly replaces OEM part numbers E8TA-5A978-AA and E8TZ5A978A, ensuring seamless integration and reliable performance.
• Premium Rubber Material: Made from high-quality, durable rubber that resists wear, corrosion, and harsh road conditions. Provides excellent elasticity and long-lasting support, reducing metal-on-metal contact and extending suspension component life.
• Vibration Dampening & Noise Reduction: Effectively absorbs shocks and minimizes road noise, delivering a smoother and quieter ride. Enhances driving comfort by stabilizing the leaf spring system and preventing squeaks and rattles.
• Easy Installation & Hassle-Free Upgrade: Includes 4 pieces for a complete set. Designed to match OEM specifications for straightforward replacement—no modifications required. Ideal for DIY enthusiasts or professional mechanics looking to restore ride quality quickly.
• Restores Suspension Performance: Reinforces the rear leaf spring assembly, prevents spring slippage, and maintains proper alignment. Improves vehicle stability, load support, and overall driving safety, especially under heavy-duty use.