Upgrade your Ford vehicle's transmission and drivetrain with this high-quality ring and pinion gear set. Specifically designed for the 9" bore diameter and 4.11 gear ratio, this set is perfect for those looking to improve their vehicle's performance and reliability. The set includes a ring and pinion, and is compatible with the F9-411 manufacturer part number. Ideal for those interested in additional differential parts, this gear set is a must-have for any car or truck enthusiast. With its precision engineering and durable construction, it is sure to provide long-lasting and reliable performance. Order now and experience the difference for yourself!