Prothane 1-1704 AMC Front Upper Coil Spring Isolator Set

The Prothane 1-1704 is a front upper coil spring isolator designed as a direct replacement for AMC vehicles from 1970 to 1983. Manufactured from Prothane's signature red polyurethane compound, these isolators outperform factory rubber units by resisting compression set, oil, and ozone degradation over time.

Unlike OEM rubber isolators that soften and deteriorate with age, Prothane's polyurethane construction maintains its shape and durometer rating, helping to preserve correct suspension geometry, reduce noise transmission into the chassis, and improve overall handling response.

Key Features:

• Manufactured from high-durometer polyurethane for extended service life
• Resists oil, grease, ozone, and UV degradation
• Maintains consistent spring rate by preventing isolator collapse
• Direct OEM replacement fit — no modification required
• Helps reduce noise, vibration, and harshness (NVH) transmitted through the coil spring
• Sold as a set for one vehicle

Prothane 1-1704 front upper coil spring isolators are an ideal upgrade during suspension rebuilds or spring replacement on classic AMC models, restoring proper ride height and chassis feedback.