Earl's Performance Straight Stainless Steel AN Bulkhead Union Fittings

Earl's Performance Straight Stainless Steel AN Bulkhead Union Fittings are purpose-built for custom automotive and motorsports plumbing installations where fluid lines must pass cleanly through frame rails, body panels, firewalls, and structural tubing. Engineered to the demanding standards that have made Earl's the benchmark in performance plumbing, these through-frame bulkhead fittings deliver a professional, factory-clean result without the need for fabricated mounting hardware or welded brackets.

Key Features:

• Premium stainless steel construction provides outstanding corrosion resistance, long-term durability, and reliable performance in demanding motorsports and street environments
• Through-frame bulkhead design allows fluid lines to route cleanly through firewalls, frame rails, and body panels, securing firmly with an included flanged bulkhead nut
• Eliminates the need for tabs or brackets on the frame, allowing plumbing to be routed cleanly along the inner edge of frame rails for a professional, factory-style finish
• Straight-through flow path ensures minimal restriction and optimal fluid transfer efficiency
• Standard AN thread specification ensures full compatibility with all AN-standard hoses, fittings, and performance plumbing components
• Sold individually with a matching flanged bulkhead nut for a complete, secure, leak-free installation
• Suitable for multiple fluid systems including fuel, brake, oil, transmission cooler, and other custom plumbing applications
• Available in multiple AN sizes to accommodate a wide variety of custom plumbing requirements

Earl's Performance Plumbing brought aviation-grade fluid transfer technology to the automotive performance market, pioneering the AN plumbing standards that the entire industry still follows today. Founded in 1955, Earl's developed and patented the self-indexing adjustable hose end and was the first to introduce flexible stainless steel PTFE-lined hoses to racing — innovations that set the standard for every plumbing brand that followed. These stainless steel bulkhead union fittings carry on that legacy, offering racers and custom builders a clean, proven solution for routing AN plumbing through any panel or structural member.