When it's time to replace your brake master cylinder, you want a part you can trust. This Raybestos MC39173 is from their Professional Grade 'PG Plus' line. That means it's engineered to match the design and specifications of your vehicle's original equipment – it's a direct, bolt-on replacement. It features a single-bore, dual hydraulic channel design that delivers the required force for safe, effective braking every time you press the pedal. The components are technically advanced to ensure reliability and durability, giving you peace of mind on the road. A properly functioning master cylinder is crucial for the entire brake system, as it's what converts your foot pressure into hydraulic pressure. This Raybestos unit is built to facilitate easy engagement and disengagement of the brake shoes (or pads). If you're doing your own brake work or having a pro do it, this is a quality part that will restore your braking system's performance.