H&R FDR-135 Spring Damping Ring Insulator for Coil Springs 130mm+ OD

The H&R FDR-135 is a coil spring damping ring (also called a spring insulator or damper sleeve) for springs with an outer diameter of 130 mm (about 5.1 in) or larger. It fits both stock springs and lowering springs. It stops the spring coils from rattling and resting against each other, which is a common issue on lowered vehicles and vehicles carrying heavy loads.

Key Features:

• Made of soft black plastic
• Has an adhesive strip on the inside
• Can be fitted without removing the spring and repositioned afterward
• Helps protect the springs from damage and corrosion
• Suitable for front or rear axle springs
• No tools needed to install
• Typically 1 to 2 rings are used per spring

Fitting the ring without removing the spring also avoids the need for a wheel alignment afterward.