The SuperPro Bush 90 Duro & Shell & Tube - SPF3189-90K is a specialized suspension component made from SuperPro's proprietary elastomer-based engineering-grade polyurethane formula. 

Key Features:

• Proprietary Polyurethane Formula: The SPF3189-90K bushings are crafted using SuperPro's own specially formulated polyurethane material. This proprietary formula is engineered to provide superior performance and durability compared to standard rubber or plastic materials.
• Combines Rubber and Plastic Characteristics: These bushings are designed to exhibit the best qualities of both rubber and plastic materials, making them an excellent alternative to traditional rubber bushings. They provide improved longevity and performance without increasing NVH (Noise, Vibration, and Harshness).
• Superior Abrasion Resistance: SuperPro polyurethane bushings have superior abrasion resistance compared to rubber, making them more durable and long-lasting, even in challenging driving conditions.
• Excellent Memory Properties: The bushings possess excellent memory properties, meaning they can return to their original shape after experiencing compression or deformation. This ensures consistent performance over time.
• Resistance to Extreme Conditions: SuperPro polyurethane bushings are unaffected by extreme temperatures, exposure to oils, and exposure to coolant. They maintain their performance and structural integrity under harsh conditions, which is vital for reliable suspension performance.
• Freedom from OE Design Constraints: Unlike original equipment (OE) rubber bushings, SuperPro bushings are not constrained by the limitations of mass-production costs, warranty requirements, or vehicle assembly considerations. This allows SuperPro to create high-quality, long-lasting suspension components that offer enhanced performance.

SuperPro Bush 90 Duro & Shell & Tube - SPF3189-90K is a superior alternative to traditional rubber bushings. With their proprietary polyurethane formula, they provide exceptional durability, performance, and resistance to various environmental factors. These bushings are an ideal choice for those looking to improve their vehicle's suspension and eliminate the common issues associated with rubber components.