KYB SM5560 Coil Spring Insulator - Front Upper

KYB SM5560 Coil Spring Insulator

KYB SM5560 is a front upper coil spring insulator built to replace hardened suspension isolators that can transmit noise and vibration into the cabin. It is an OE-quality mount component for drivers who need a direct-fit suspension repair for select Nissan 350Z and INFINITI G35 applications.

Part of KYB’s Mount Components line, this spring insulator is engineered for application-specific fitment and suspension performance. If you are servicing a 2003-2009 Nissan 350Z front upper suspension or a 2003-2007 INFINITI G35 front upper spring seat area, KYB SM5560 provides a focused replacement solution.

Key Features

• Replacement spring insulator for front upper suspension locations
• Helps reduce squeaks, rattles, and vibration noise from worn isolators
• Built to match or exceed original equipment design and quality
• OE-style replacement component for select Nissan and INFINITI platforms
• KYB Mount Components line for suspension service and restoration

Detailed Description

KYB SM5560 is designed to restore the isolation function between the spring and its mounting point, helping the suspension operate more quietly and consistently. Worn or hardened insulators can allow unwanted noise and vibration to pass through the chassis; replacing them with a properly matched component helps return the suspension to its intended feel. This part is a practical choice for owners searching for a front upper coil spring insulator for 2003-2009 Nissan 350Z or 2003-2007 INFINITI G35 models.

The KYB Mount Components line focuses on suspension hardware that follows OE-style fit and function. For buyers comparing KYB SM5560 against other replacement options, the part number SM5560 is the key identifier for this application-specific insulator.

Common Problems This Part Can Address

• Squeaking from aged spring insulators
• Rattling or clunking noise at the front upper suspension
• Vibration transfer caused by hardened rubber components
• Loss of isolation between the coil spring and mount area
• Suspension noise after replacing other worn front-end parts

Installation Notes and Tips

Install SM5560 only in the confirmed front upper position listed for the vehicle application. Inspect the surrounding spring seat, mount surfaces, and adjacent suspension components for wear before reassembly. Because this is a fitment-specific suspension component, verify the year, make, model, and position before ordering or installation. Fits 2003-2009 Nissan 350Z, front upper. Fits 2003-2007 INFINITI G35, front upper.

Quality Assurance

KYB states that its spring seats and insulators are built as OE-quality replacement components for each application, with design and quality intended to match or exceed original equipment standards. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.