VENTED FUEL CELL CAP (FO R SCREW ON STYLE CAP ONL

The VENTED FUEL CELL CAP for screw-on style caps is an essential upgrade for high-performance and custom vehicle builds where fuel system safety and reliability demand professional-grade components. Designed specifically for raised cell-mount applications, this aluminum filler cap serves both street machines and competition vehicles that require compliance with modern fuel cell regulations. Whether you're building a hot rod, off-road rig, or performance project car, a properly vented fuel cell cap prevents pressure buildup that can compromise fuel pump operation and tank integrity.

Manufactured from durable aluminum in natural finish, this Willys Carb component features a 3-1/4 inch outside diameter screw-on design that accommodates standard fuel cell filler necks with raised mounts. The integrated roll-over valve (commonly found on racing fuel cells) allows venting during acceleration, braking, and cornering while preventing fuel sloshing and spillage—critical for both safety and pit compliance at sanctioned events. The vented design maintains proper atmospheric pressure inside the tank, ensuring consistent fuel delivery to your carburetor or fuel injection system and preventing vapor lock during extended high-performance runs.

This cap is ideal for mechanics and builders working on custom fuel cell installations, street rod restorations, and competition vehicles where OEM caps are unsuitable. Installation is straightforward: simply thread the cap onto your fuel cell's filler neck until snug—do not overtighten. Ensure your fuel cell's vent line is properly routed to prevent fuel odors or overflow during fill-ups. The compact 3.35 x 3.2 x 5.2 inch package makes it easy to stock on your workbench for quick fuel system upgrades.