3AN Alum Tube Sleeve Use with 818-03 6/pkg

The 3AN aluminum tube sleeve use with 818-03 is a precision fluid-line protective component designed for high-performance automotive and motorsport applications where fuel, coolant, or hydraulic lines require shielding and organization. This sleeve protects braided or rigid tubing from heat damage, abrasion, and mechanical stress—critical concerns when routing lines through engine bays or near exhaust components. Sold in a 6-pack, these sleeves are essential for builders and technicians assembling custom fuel systems, turbo kits, and high-horsepower builds where line integrity directly impacts reliability and safety.

Crafted from lightweight aluminum, the 3AN tube sleeve delivers corrosion resistance and thermal stability without adding unnecessary weight to your system. The 3AN designation refers to the tube outer diameter (3/16 inch), making this sleeve compatible with standard -3AN braided hose and rigid tubing configurations commonly used in performance fuel systems and hydraulic assemblies. The engineered fit ensures the sleeve remains securely positioned during vibration and thermal cycling, maintaining consistent protection throughout the vehicle's operational envelope. Aluminum construction also provides excellent EMI shielding properties, protecting sensitive fuel-injection systems from electrical interference in high-output or supercharged applications.

This product is ideal for engine builders, tuners, and DIY enthusiasts installing aftermarket fuel systems, racing fuel cells, or custom hydraulic lines in modified vehicles. Installation is straightforward—simply slide the sleeve over the appropriate tube section and secure as needed alongside clamps and routing hardware. The 6-pack quantity allows for multiple installation points, supporting full-system builds on engines with multiple fuel rails, return lines, or auxiliary cooling circuits. Compatible with any -3AN hose system using standard automotive clamps and hangers, these sleeves integrate seamlessly into both street and competition builds.