Rear drum brake wheel cylinder designed to convert hydraulic brake pressure into mechanical force that expands the brake shoes against the brake drum for dependable stopping performance. Manufactured to meet or exceed OEM specifications for proper fit, form, and function. Built with durable cast iron construction and high-quality EPDM rubber seals for long service life and leak-free operation. Direct replacement for the original factory wheel cylinder. Please verify compatibility with your vehicle using the part number before purchase.