Best AN ORB fuel line fittings

Start with the EVIL ENERGY AN flare-to-ORB male adapter. It's the most straightforward pick for a fuel rail or regulator port: 6061-T6 aluminum, black anodized, and it comes in 4AN through 12AN, so you can match your line size instead of hunting for a one-off. Buy two if you're plumbing both ends.

Who the others suit:

• Radium Engineering 10AN ORB to 6AN male — a step-down for feeding a smaller line off a big ORB port; Radium's machining is the reason people pay for it.
• Aeromotive ORB to AN flare, 90° — when a straight fitting won't clear a firewall, intake or frame rail.
• Vibrant straight adapters — a solid mid-tier choice if you want a known brand in a plain straight fitting.
• ICT Billet AN-to-ORB — budget-friendly for LS and domestic swaps.
• OneHydraulics stainless 90° — high-pressure and harsh-duty plumbing where aluminum is too soft.

Two things to get right before you order: match the ORB thread size to the port (an -6 ORB is 9/16-18, not 3/8 NPT), and use a fresh O-ring — an ORB fitting seals on the O-ring, not the threads, so don't add tape or sealant to it.