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This is a billet aluminum adapter that steps a 20AN ORB (O-ring boss) port down to a 12AN male flare, made for fuel, oil, coolant and breather plumbing. It is CNC machined from 6061 aluminum, black anodized, and includes the O-ring for the ORB end. The internal bore runs straight through with no step, so flow stays clean, which matters on high-volume fuel and cooling lines. It suits racers and builders running large AN systems who need a leak-free ORB-to-flare transition in one piece.
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This adapter fitting has a 20AN ORB male thread on one end and a 12AN male end on the other. It is used mainly in fuel, cooling, oil and breather systems, and also on radiators and firewall pass-through blocks.
It is CNC machined from 6061 billet aluminum and finished in black anodizing. The inside diameter makes a clean transition from one end to the other, with no steps to impede water or air flow. It was developed as part of the Ultra Street program with a focus on maximum flow.
An O-ring is included for the ORB end. Aluminum AN wrenches are recommended for tightening, because a standard steel wrench can gall or scratch the anodized finish.
