Rear Differential Mount Insert by SuperPro SuperPro\’s fitter friendly complete front lower control arms offer not only a significant performance and durability upgrade – they also offer an easy DIY or professional install. No pressing in new bushings – these arms arrive fully assembled with pre-installed SuperPro bushings and new ball joints. We\’ve worked hard to make these a huge bang-for-the-buck upgrade with fully upgraded and outfitted arms offering a front end refresh for your ride! Features SuperPro Rear Differential Mount Insert Benefits Enhances your vehicles handling and performance Unaffected by extreme temperatures, oils, water or coolant A superior alternative to rubber: providing higher quality, quieter, longer lasting bushings Made with SuperPro\’s proprietary engineering-grade polyurethane formula Designed, engineered and manufactured in Australia Applications 2004 Pontiac GTO What\’s In The Box? 1 – Rear Differential Mount Insert Warranty Lifetime Warranty