Bilstein B6 4600 (Air) shock absorbers and suspension air springs are an upgrade to the original air suspension systems on light truck and SUVs equipped with factory air suspension. Bilstein is an OE supplier for air suspension systems; the quality of these products meets, and typically exceeds, the standards set forth by the vehicle's manufacturer. Bilstein B6 4600 (Air) shock absorbers and suspension air springs are designed to connect directly into the original connectors on the vehicle, ensuring modification-free installation and provide better handling and comfort.