2017 Subaru WRX Fittings

Why Fittings Matter in High-Performance Builds

Fittings are the unsung heroes of every high-performance vehicle. Whether you're routing fuel to a carburetor, delivering oil to a turbocharger, or connecting a braided line to a fuel pump, the fitting at every junction determines whether your build stays sealed under heat, vibration, and pressure — or develops a costly, dangerous leak. From street builds to all-out race cars, choosing the right fitting for each application is just as critical as any major component.

The world of automotive fittings spans a wide range of designs: AN (Army-Navy) hose ends, NPT pipe adapters, push-lock barb fittings, dry-break quick-disconnects, and specialty fittings engineered for specific applications like turbocharger oil line connections or carburetor fuel inlet ports. Material choices — aluminum, stainless steel, brass — and seal types affect compatibility with different fluids and operating temperatures, making it important to match the right fitting to each task.

Exploring the Fittings Category

The largest segment of our fittings catalog is fuel hose fittings, which cover everything from simple straight hose ends to complex multi-angle adapters used in fuel injection and carbureted systems alike. For racing and professional pit crews, dry break fuel fittings are indispensable — they allow rapid, spill-free fuel connections without tools, saving valuable time between rounds. Builders adding forced induction to their vehicles will find turbocharger oil line fittings essential for safely routing lubrication to and from the turbo bearing housing. Rounding out the lineup are carburetor fuel inlet fittings for classic and drag racing builds, and fuel pump fittings that ensure secure, leak-free connections at the heart of the fuel delivery system.

Top Brands in Fittings

Jiffy-Tite is the definitive name in quick-connect fluid fittings. Headquartered in Lancaster, New York, Jiffy-Tite has been a manufacturer of fluid connectors for the automotive industry since 1963. Jiffy-Tite is the only quick-connect fitting on the market approved for use in all categories of NHRA and IHRA. Their tool-free, self-sealing design is trusted by racers and OEM manufacturers alike.

Earl's Performance is one of the oldest and most respected names in performance plumbing. Earl's Performance Products was founded by Earl Fouts in 1955 in Lawndale, California, with the mission to supply high-quality military aircraft surplus plumbing components directly to the racing industry. Earl's developed industry-changing products including the patented self-indexing adjustable hose end, or Swivel-Seal, which allows 360-degree adjustment after installation. Their extensive catalog covers virtually every AN fitting application imaginable.

Red Horse Performance has built a devoted following by combining precision manufacturing with standout aesthetics. Red Horse Performance is the only fitting company with a lifetime warranty against manufacturing defects on all fittings and adapters. Their inventory includes sizes from -3AN to -20AN, ensuring compatibility with various fluid system applications from small vacuum lines to high-volume fluid delivery systems.

Vibrant Performance is known for a broad catalog of high-quality AN fittings and adapters, widely used in both performance street builds and motorsport applications. Their fittings are popular with fabricators who need consistent quality across a wide variety of thread standards and configurations.

Fleece Performance specializes in diesel performance, offering fittings engineered for the high-pressure, high-volume demands of turbocharged diesel fuel and oil systems. Their fittings are a go-to choice for performance diesel builders who need robust, purpose-built solutions for demanding applications.

Choosing the Right Fitting

When shopping fittings, consider the fluid type (fuel, oil, coolant, or brake fluid), the operating pressure and temperature, the hose or line size using AN or NPT sizing standards, and the connection angle required for a clean routing path. Always verify seal material compatibility — nitrile seals work well for petroleum-based fluids, while fluorocarbon (Viton) seals are preferred for alcohol, E85, or aggressive fuels. Whether you're building a weekend cruiser or a dedicated race car, investing in quality fittings from proven brands is the best insurance against fluid leaks and unplanned downtime.