8AN to 1/4NPSM AN/JIC Flare

The 8AN to 1/4NPSM AN/JIC Flare fitting from REDHORSE PERFORMANCE is an essential hydraulic and fuel system adapter for serious engine builders and high-performance automotive technicians. This adapter bridges two critical industry-standard thread sizes—8 AN (1/2-inch diameter) to 1/4 NPSM (National Pipe Straight Mechanical)—allowing seamless integration between modern aftermarket plumbing systems and factory or custom manifold ports. Whether you're fabricating custom fuel rails, turbo oil cooler lines, or hydraulic brake systems on a full engine swap, this fitting eliminates the need for improvised solutions or expensive custom manifolds.

REDHORSE PERFORMANCE AN/JIC flare fittings are precision-engineered with dual-cone flare geometry that ensures leak-free connections under high pressure and thermal cycling. The 8AN side accepts standard hose barbs, crimped fittings, or braided PTFE lines, while the 1/4NPSM port threads directly into aluminum or cast-iron blocks without adapter spool pieces. Machined from aerospace-grade aluminum alloy, these fittings withstand fuel system pressures exceeding 100 psi and sustained oil temperatures above 250°F—critical for turbo and supercharger applications where traditional rubber hose routing fails. The compact 2.8 x 1 x 3.8-inch profile minimizes underhood packaging constraints on tight engine compartments.

This adapter is indispensable for LS swaps, rotary conversions, and late-model fuel injection retrofits where 8AN braided hose systems connect to legacy 1/4-inch NPT ports on valve covers, water pumps, or gauge sandwich blocks. Professional engine builders rely on REDHORSE fittings for their consistent quality and proven reliability across thousands of street and competition builds. Installation requires standard wrenches on both the AN flare nut and the threaded port—no special tools needed. The 0.11-pound weight makes it suitable for weight-sensitive racing applications while maintaining full structural integrity.