12AN Crimp Style Hose End Black STR

The 12AN Crimp Style Hose End Black STR from Redhorse Performance is a precision-engineered fitting designed for high-pressure fuel, coolant, and brake line applications in custom automotive builds and engine modifications. This component is essential for builders who demand reliable, leak-free connections in turbocharged, supercharged, or heavily modified vehicles where OEM hose routing falls short. Whether you're upgrading a fuel system on a street car, fabricating custom cooling lines, or assembling a competition engine bay, this hose end delivers the security and durability required in demanding motorsport and street performance applications.

The 12AN crimp-style design uses a mechanical swage connection that permanently compresses onto braided stainless steel or nylon hose, creating a vibration-resistant, pressure-rated seal without reliance on threaded compression fittings that can loosen under engine bay heat and vibration. The black finish provides both aesthetic integration into engine compartments and corrosion resistance in harsh underhood environments. Redhorse Performance hose ends are manufactured to SAE J518 standards, ensuring consistent wall thickness, bore concentricity, and burst ratings that exceed typical OEM specifications—critical when running elevated fuel pressures, coolant temperatures, or brake fluid temperatures beyond factory limits.

This fitting is ideal for custom fuel system builders, performance technicians, and engine builders constructing bespoke cooling or brake systems on street rods, race cars, and modified trucks. Installation requires a dedicated AN hose crimper and compatible 12AN hose; once properly crimped, the connection is permanent and maintenance-free. Verify hose inner diameter matches the 12AN specification (typically 3/4-inch ID) and confirm your system's operating pressure falls within the hose assembly's rated capacity before final installation. The compact 2.8 x 1.4 x 3.8 inch profile allows flexible routing in tight engine bays, and the straight configuration suits direct line runs without additional elbows.