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BBK polyurethane rear spring isolators for 1979–2004 Mustang are direct replacements for aging rubber isolators and are recommended when installing lowering springs. The polyurethane material resists drying, cracking and deterioration, preventing noise and vibration caused by metal‑to‑spring contact. Sold as a pair, rear kits include four pieces and restore reliable spring seating and quieter operation.
BBK 86-04 Mustang Rear Spring Isolators - Polyurethane
