Bulkhead AN Straight -4

The Bulkhead AN Straight -4 from Allstar Performance is a precision hydraulic and fuel line adapter engineered for custom automotive plumbing applications. Designed for builders and mechanics who demand reliability in high-performance engine builds, this fitting serves as a critical junction point in fuel delivery, cooling, and brake systems where space constraints and vibration resistance are paramount.

Manufactured to AN (Army-Navy) standard specifications, the Bulkhead AN Straight -4 features a -4 port size (1/4-inch nominal diameter) with a straight-through design that minimizes turbulence and pressure drop across the fitting. Allstar Performance constructs this adapter from aluminum alloy, providing an optimal balance of lightweight construction and structural integrity—critical for weight-sensitive performance builds.

Professional engine builders and fabricators rely on the Bulkhead AN Straight -4 for custom fuel injection systems, ensuring leak-free connections in demanding environments. The straight configuration eliminates directional flow restrictions, making it ideal for inline installations where maximum flow rate and consistency matter.