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This installation kit is required to install an MM Rear Coil-over Kit with the Ford OEM 2003-04 Cobra Bilstein shocks. The OEM Cobra Bilstein upper rubber isolator is shorter and softer than the isolator that comes with an aftermarket Bilstein IRS shock. Because of this, the OEM Cobra Bilstein upper rubber isolator prevents the shock's upper retaining nut from being properly tightened when a MM Rear Coil-over Kit is installed. This may cause noise, and can even damage the upper mount for the coil-over kit. Aftermarket Bilstein shocks come with the correct upper rubber isolator, and do not require this installation kit.

Installation kit for MM Rear Coil-over Kits fits the 2003-04 Cobra OEM Bilstein IRS shocks (regardless of what year chassis these shocks are installed in). Kit is for two shocks, and includes the correct upper rubber isolators, thrust washers, and locking nuts. One kit required per car.