The SuperPro 8mm rear lower spring isolator for 2004 Pontiac GTO supports correct spring seating and rear ride height. Made from an engineered polyurethane compound, it resists softening, oils and water that shorten rubber part life. This isolator provides permanent spring location and quieter operation, helping preserve alignment, reduce uneven tire wear, and maintain predictable suspension behavior over time.
SuperPro 2004 Pontiac GTO Base Rear 8mm Lower Spring Isolator