Product Description: Reliable Front Axle Vacuum Knuckle and Tube Seal Kit for Enhanced Vehicle Protection Optimize your vehicle's performance and protection with our Front Axle Vacuum Knuckle and Tube Seal Kit. Specifically designed for durability and precision, this comprehensive kit ensures your vehicle operates smoothly under all conditions. Vehicle Fitment: This front axle vacuum knuckle and tube seal kit is custom-designed for the F‑450 and F‑550 Super Duty models equipped with Dana 50 and 60 axles from 1998 to 2004. Ensure perfect compatibility and optimal performance with this tailored solution. OE Numbers: This kit includes replacement OEM part numbers 50491, 50381, and 41784‑2, providing a convenient reference for accurate installation. Ensure the right fit and functionality by matching these numbers to your vehicle's specifications. Comprehensive Kit: The kit offers complete protection with two inner knuckle oil seals that fit on the outer axle, two outer tube oil seals (also known as dust seals) that fit on the inner axle shaft next to the yoke, and two vacuum seal O-rings for the wheel hub bearing assembly. This comprehensive package ensures all critical areas are covered for maximum efficiency. Enhanced Protection: Designed to serve as an outer axle shaft seal, this tube seal kit effectively prevents dirt and debris ingress, significantly enhancing the protection levels of your vehicle. Maintain the integrity of your axle components for improved performance and longevity. Superior Durability: Crafted from high-quality steel and rubber materials, this front axle knuckle seal kit is engineered to withstand high temperatures and resist rust. Its robust construction guarantees long-lasting durability, providing reliable performance even under challenging conditions. Upgrade your vehicle's axle protection with our Front Axle Vacuum Knuckle and Tube Seal Kit. Its durable materials, comprehensive coverage, and precise fit make it an essential addition for maintaining your vehicle's performance and safeguarding critical components.