Description
When upgrading your brake system or fuel line routing, mismatched fittings can compromise both performance and safety. These Allstar Performance adapter fittings provide a reliable solution for connecting -4 AN hardline to 3/8-24 inverted flare ports, commonly found on brake calipers and proportioning valves. Steel construction with zinc oxide plating ensures corrosion resistance and durability in high-heat engine bay environments.
Whether you’re fabricating a custom brake setup or adapting existing hardline runs, this two-pack eliminates the guesswork and keeps your system leak-free under pressure.
- -4 AN Male inlet
- 3/8-24 inverted flare outlet
- Straight configuration
- Steel with zinc oxide
- Brake caliper compatible
- 3/16″ hardline rated
- Sold as pair
- Bolt-on ready
- MPN: ALL50030






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