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The Prothane coil spring isolator cushion is made to fit 1999–2004 Mustang Cobra IRS coil springs, providing a quiet interface between spring and seat. The red isolator helps reduce spring noise and metal-to-metal contact while preserving ride compliance. It’s a straightforward service item for restoring proper spring seating and minimizing creaks on Cobra IRS suspension setups from the specified years.
Prothane 99-04 Mustang Cobra IRS Coil Spring Isolators - Red
