90 Degree Fitting Tight Radius -4AN for PTFE

The 90 Degree Fitting Tight Radius -4AN for PTFE is a precision hose end connector engineered for high-performance fuel, coolant, and brake line systems where space constraints demand compact routing without sacrificing flow integrity. Built for automotive enthusiasts and professional mechanics performing engine swaps, fuel system upgrades, and custom plumbing installations, this fitting solves the persistent challenge of tight-radius bends in modern engine bays where traditional 45-degree or long-radius fittings simply won't fit. Whether you're fabricating a custom fuel rail, reconfiguring a radiator hose layout, or adapting a carbureted engine to a tight modern chassis, this connector delivers reliability where real estate is premium.

Constructed from aluminum with black anodized finish for corrosion resistance and professional appearance, the 90 Degree Fitting features a tight radius design that minimizes internal turbulence and pressure drop while negotiating sharp bends—critical for maintaining fuel atomization and brake line responsiveness under load. The -4AN (4 AN) size designation indicates compatibility with standard -4 hose and 4 AN female ports, a specification verified across OEM and aftermarket systems. PTFE hose compatibility ensures chemical resistance to modern fuels, methanol blends, and racing additives, while the aluminum construction offers a weight advantage over steel alternatives—a consideration that compounds across multiple fittings in comprehensive engine bay redesigns. The compact dimensions (3.54 x 0.5 x 6.3 inches) and lightweight profile (0.05 lbs) make it ideal for build situations where every cubic inch and gram matter.

This fitting is indispensable for EFI conversions on vintage platforms, turbo plumbing in tight engine compartments, and any application requiring 90-degree routing without the footprint of traditional long-radius elbows. Mechanics performing fuel cell retrofits, custom cooling systems, and high-pressure line fabrication rely on tight-radius fittings to preserve under-hood packaging and maintain OEM-style cleanliness. Verify -4AN compatibility on both hose and female port sides before ordering; this fitting is sold individually, so plan your system layout to account for the quantity needed across your fuel, coolant, or brake circuits.