Fire sleeve 12AN 25mm ID 6ft Black

The Fire sleeve 12AN 25mm ID 6ft Black from REDHORSE PERFORMANCE is purpose-built thermal protection tubing designed for high-heat fuel line, brake line, and hose management in modified vehicles and performance engines. As a mechanic working on turbocharged, supercharged, and naturally aspirated builds, you'll recognize this as essential protection when routing fuel and fluid lines near exhaust manifolds, turbochargers, and engine bays where ambient temperatures exceed 200°F. Fire sleeves prevent hose degradation, fuel vapor issues, and potential system failures that cost time and money to diagnose and repair.

This REDHORSE sleeve features a 25mm inner diameter (12AN equivalent sizing) and extends 6 feet, offering flexible coverage for single or multiple hose runs in tight engine compartments. The woven fiberglass construction with heat-resistant exterior coating reflects radiant energy and dissipates direct contact heat, maintaining internal hose integrity even under sustained high-temperature exposure. Black finish blends cleanly into modern engine bays while resisting UV degradation and ozone cracking over extended service life. The 6-foot length cuts efficiently to custom fit your specific hose routing without waste, whether you're protecting a return fuel line, transmission cooler line, or braided brake circuit.

Builders working on LS swaps, turbo conversions, and fuel-injected engine conversions rely on this sleeve to prevent premature hose failure and maintain fuel system safety margins. The 12AN sizing accommodates standard -12 braided hose and adapters commonly found in performance fuel systems, transmission lines, and brake upgrades. Installation is straightforward—slide the sleeve over hose before final routing, secure with stainless clamps at key points, and you've added years of protection. Weighing just 1.39 lbs for the full 6-foot length, it adds no meaningful mass while delivering measurable thermal protection that justifies inclusion in any serious engine build or modification.