Brake Line Adapters -4 to 3/16 Inv Flare 2pk

The Allstar Performance Brake Line Adapter -4 to 3/16 Inverted Flare 2-pack (ALL 50101) is a precision fluid coupling system engineered for high-performance vehicles requiring custom brake line configurations. These adapters bridge -4 AN male ports to 3/8-24 inverted flare female connections, accommodating applications where OEM brake lines need to transition between different industry-standard connector types. Constructed from steel with zinc oxide corrosion resistance, this two-piece set delivers reliable pressure integrity across hydraulic brake systems in performance and custom automotive builds.

Each adapter features clip-in installation mechanics for secure seating without thread galling risk. The 3/8-24 inverted flare female end accepts standard DOT brake lines while the -4 AN male connection provides rated pressure containment for motorsport and aftermarket cooling/brake system builds. Steel construction ensures dimensional stability under thermal cycling and hydraulic pressure loads common in drag racing, road course, and off-road performance applications. Zinc oxide plating resists corrosion in damp shop environments and salt-air coastal storage conditions. Weight of 0.19 lbs confirms compact, lightweight geometry suitable for engine bay installations where space optimization matters.

Custom brake line routing in carbureted street machines, tube-frame race cars, and restorations often requires mixing industry standards—Allstar adapters eliminate the need for expensive custom fabrication or incompatible fittings. Buyers doing full brake system overhauls, fuel line reconfiguration, or cooling loop plumbing benefit from having matched pairs on hand. The two-pack format supports front/rear dual-circuit builds or provides redundancy for competition vehicles where fitting failure means immediate loss of braking authority.

Allstar Performance has maintained market credibility in the oval-track, bracket-racing, and street-rod segments for decades, positioning this adapter within a trusted ecosystem of standardized connectors. The -4 AN to 3/16 inverted flare conversion remains industry-standard across hot rod suppliers, motorsports machine shops, and OEM specialty applications, ensuring part availability and future compatibility.