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The Prothane coil spring isolator is designed for 1999–2004 Mustang Cobra IRS coil springs, offered in black to match factory appearance. It cushions the spring-to-seat interface to reduce noise and metal-to-metal contact while preserving suspension compliance. This isolator is a straightforward replacement part for restoring proper spring seating and minimizing creaks on the specified Cobra IRS suspension.
Prothane 99-04 Mustang Cobra IRS Coil Spring Isolators - Black
