#3 Caps

EARLS #3 Aluminum Caps are precision-engineered port closures designed for high-performance fuel system applications in modified and performance vehicles. Built by EARLS, a trusted name in motorsport hydraulics and fuel delivery systems, these caps seal off unused AN fittings on fuel rails, carburetors, and custom fuel distribution blocks. They are essential for preventing fuel leakage, contamination, and air ingestion while maintaining system pressure integrity.

Constructed from lightweight aluminum alloy, the #3 cap provides a clean seal on AN-sized ports and is compatible with EARLS' full range of fuel fittings and manifold blocks. The compact 1.15 x 0.5 x 2.4 inch profile minimizes engine bay clutter while the minimal 0.02 lb weight contributes nothing to unsprung mass or fuel system inertia. The anodized finish resists fuel degradation and vibration-induced corrosion in demanding underhood environments.

Mechanics and engine builders use EARLS #3 caps when configuring custom fuel delivery systems with unused port capacity or when converting between carbureted and EFI platforms. These caps thread directly onto #3 AN ports, ensuring a reliable seal that holds across thermal cycling and pressure fluctuations common in modified fuel systems. They are a vital component for any fuel rail or block that has multiple ports.