#4 45 Stl Swivel (Teflon

The AEROQUIP #4 45-degree swivel fitting with Teflon is an essential hydraulic connection component for custom automotive builds, performance fuel systems, and brake line installations. Whether you're fabricating a modified engine bay, upgrading to braided stainless steel hose assemblies, or building a custom cooling or fuel delivery system, this swivel coupling allows for precise angled pressure line routing without kinks or stress concentrations. The 45-degree angle geometry makes it ideal for tight engine compartment layouts where straight fittings won't work, giving builders the flexibility to redirect flow around obstructions while maintaining system integrity and pressure ratings.

Manufactured by AEROQUIP, a trusted leader in high-performance hydraulic solutions, this #4 swivel fitting features internal Teflon sealing surfaces that reduce friction, improve flow efficiency, and extend hose life by minimizing abrasion at connection points. The swivel design allows the fitting body to rotate independently of the hose, eliminating torsional stress during installation and vibration cycles—critical for engine bay environments subject to heat cycling and movement. The compact 2.3 × 1.1 × 4.3-inch profile and lightweight 0.1-pound construction make it easy to integrate into space-constrained applications without adding unnecessary mass to your suspension geometry or brake package.

Mechanics and fabricators building custom fuel injection systems, turbo cooling loops, or aftermarket braking upgrades will appreciate the reliability and repeatability this AEROQUIP fitting delivers. The #4 size (equivalent to -4 JIC or SAE designation) accommodates mid-range flow rates suitable for most carbureted and fuel-injected street engines, while the 45-degree angle orientation simplifies plumbing in confined environments without compromising pressure rating or safety margins. This fitting pairs seamlessly with AEROQUIP hose assemblies and compatible -4 SAE/JIC connections found in performance fuel systems, hydraulic brake conversions, and high-flow cooling applications.