Upgrade your braking system with the Stoptech 130.45103 Brake Master Cylinder, designed to enhance the performance of your 1981-1983 Mazda RX-7. This premium brake master cylinder is crafted to meet high-quality standards, ensuring a reliable and effective braking experience. It features an original aluminum casting body design where applicable, providing excellent durability and longevity. The Stoptech Brake Master Cylinder includes all necessary components such as reservoirs, switches, and floats, ensuring a hassle-free installation. Its precise configuration and fitment match original equipment parts, allowing for seamless integration with your vehicle. Trust Stoptech for superior braking performance that meets and exceeds your expectations, making your driving experience safer and more enjoyable. <b>Features:</b> * High-quality construction for reliable braking performance * Includes reservoirs, switches, and floats for easy installation * Original aluminum casting body design for enhanced durability * Precise fitment for seamless integration into Mazda RX-7 models