Prothane 12-301 Rear Control Arm Bushing Kit for Mazda Miata 1990-2005

Prothane's 12-301 Rear Control Arm Bushing Kit is engineered specifically for the Mazda Miata and delivers a significant upgrade over the factory rubber bushings that wear and deteriorate over time. Worn OEM rubber bushings allow the control arms to shift under load, causing your caster and camber alignment settings to drift — leading to unpredictable handling and uneven tire wear. Prothane's polyurethane bushings solve this problem by providing superior compliance resistance that keeps your suspension geometry locked in place.

Manufactured from Prothane's proprietary polyurethane compound, these bushings are formulated to outperform and outlast conventional rubber in demanding conditions. Unlike rubber, polyurethane resists degradation from road oils, solvents, and UV exposure, ensuring a long service life without the squish and deflection associated with stock components.

Key Features:

• Direct-fit replacement for OEM rear control arm bushings
• Polyurethane construction resists oils, solvents, and UV degradation
• Maintains accurate alignment settings — caster and camber stay where you set them
• Reduces suspension slop for more precise, responsive handling
• Superior compliance resistance compared to factory rubber bushings
• Includes grease for proper installation and long-term lubrication
• Made in the USA

This kit includes all necessary bushings to complete the rear control arm replacement on both sides of the vehicle. Whether you are restoring a high-mileage Miata or upgrading a performance build, the Prothane 12-301 is a cost-effective suspension improvement that delivers real, measurable results.