Feature: 1. Applicable Model: The master slave cylinder kit is for F‑450 F‑550 Super Duty 2006 to 2007. Please confirm whether it is consistent with the product you want before buying to avoid unnecessary return. 2. OE Number: The part numbers for reference are CC649071, 6C3Z7C522C, 136.65528. Please confirm whether it is consistent with the OE you need to avoid wrong buying and other problems. 3. Sturdy Construction: Made of high hardness metal alloy material, the master slave cylinder assembly is resistant to oxidation and rust, ensuring reliable performance and longer lifespan. 4. Enhanced Performance: The kit comes with a master cylinder and a slave cylinder with line, ensuring maximum efficiency and improving overall clutch performance and hydraulic pressure for more efficient shifting. 5. Easy to Install: The clutch master slave cylinder assembly kit has a simple and convenient installation, time and effort saving, no special tools or complicated steps required. Specification: Item Type: Clutch Master and Slave Cylinder OE Number: CC649071, 6C3Z7C522C, 136.65528 Fitment: Fit for F-450 F-550 Super Duty 2006-2007. Package List: 1 x Clutch Master and Slave Cylinder (2 Components) Note: Please double check the part number and fitment of your item, matching information is for reference only.