8AN Male Roll Over Vent Valve Black

The 8AN Male Roll Over Vent Valve in Black by REDHORSE PERFORMANCE is an essential component for serious fuel system builds, particularly in high-performance and modified vehicles where fuel sloshing during aggressive driving demands reliable vapor management. This valve prevents fuel from escaping the tank during hard acceleration, cornering, and rollover events—situations where traditional fuel systems fail. Whether you're building a track car, off-road rig, or street machine with aggressive suspension geometry, a quality roll-over vent valve is non-negotiable for safety and component longevity.

This 8AN-port valve operates on a gravity and inertia-activated principle, allowing air to vent freely during normal driving while automatically sealing during rollover or inverted tank conditions. The black anodized aluminum construction resists corrosion and integrates seamlessly into custom fuel systems built with AN (Army-Navy) hose standards. The compact form factor—measuring 2.8 x 1.4 x 3.8 inches—fits tight engine bays without sacrificing functionality. REDHORSE PERFORMANCE's machining tolerances ensure consistent flow rates and reliable sealing, critical for fuel-injected platforms running high fuel pressure or carbureted applications where vapor lock prevention is paramount.

Experienced fabricators and performance builders rely on this valve for fuel cell installations, race car builds, and heavily modified street vehicles where OEM fuel tank geometry no longer applies. The 8AN male connection accepts standard braided fuel line or custom -8AN hose assemblies, making integration straightforward in both traditional and modern EFI systems. Installation typically mounts between the fuel tank vent line and charcoal canister or open atmosphere, protecting fuel system integrity during track days, autocross events, and extreme driving conditions. Weighing just 0.195 lbs, it adds negligible mass while providing peace of mind that fuel stays contained when it matters most.