This high-quality brass proportioning valve combination disc is the perfect fit for your 1978-87 Chevy GMC Full Size Truck. It is designed to provide efficient and reliable braking performance without compromising your driving experience.

Crafted with precision and care, this master cylinder is designed to meet the highest standards of quality and durability. It is easy to install and comes with all the necessary hardware required for a hassle-free installation. Upgrade your truck's braking system with this top-of-the-line part and enjoy a safer and smoother driving experience.