C/O Spring Rubber 3/4in

The AFCO Racing Products C/O Spring Rubber 3/4in is a precision polyurethane isolator engineered for competition and street-performance suspension systems. Designed specifically for coil-over spring assemblies with 2.5 to 2.625 inch inner diameters, this rubber component serves as a critical vibration dampener between your spring and chassis mounting point. Whether you're building a road-race setup, autocross competitor, or upgrading a street car's suspension geometry, the spring rubber isolates drivetrain harmonics and reduces transmitted noise while maintaining suspension articulation.

Manufactured from durable black polyurethane, this 0.75 inch height isolator absorbs micro-movements and shock impulses that would otherwise transfer directly to the vehicle frame and body. The material's inherent compliance allows the spring to function independently without coupling spring rate unpredictably to frame stiffness, a common problem when springs sit directly on metal pillows. At 0.43 lbs per unit, the weight penalty is negligible while the performance gain—reduced harshness, improved driver feedback, and extended component life—is measurable. AFCO's manufacturing tolerances ensure consistent performance across multiple installation points, critical for balanced corner weighting and suspension symmetry in high-demand motorsport applications.

This isolator is essential for anyone running aftermarket coil-over kits, whether single-adjustable or double-adjustable damper setups, and suits both dedicated race cars and street machines operating at elevated spring rates. Installation is straightforward: position the rubber between the spring's lower perch and the mounting location during coil-over assembly or rebuild. Mechanics and enthusiasts upgrading tired OEM suspension or diagnosing clunks and noise from aged rubber bushings will find this AFCO component a reliable, cost-effective solution. Ensure your existing springs measure 2.5 to 2.625 inches in outer diameter for proper fitment; verify spring seating before final torque to prevent rotation or binding.