#4 Male to #10 ORB Str Fitting

The #4 Male to #10 ORB Straight Fitting from XRP-XTREME RACING PROD. is a precision hydraulic and fuel line adapter engineered for high-performance fuel system and brake line applications in modified vehicles, race cars, and custom engine builds. This adapter allows technicians and enthusiasts to seamlessly connect -4 AN male fittings to -10 AN O-ring boss (ORB) ports, eliminating the need for bulky manifolds or secondary adapters that waste underhood space and add unnecessary weight. Whether you're upgrading a fuel system on a turbocharged engine, integrating aftermarket fuel rails, or reconfiguring brake lines in a chassis-welded competition platform, this straight fitting delivers the compact, leak-free solution that serious builders demand.

Machined from aluminum and finished in black anodized coating, this straight fitting combines lightweight construction with superior corrosion resistance—critical properties in fuel systems exposed to ethanol-blend gasoline, moisture, and thermal cycling. The O-ring boss (ORB) design on the #10 AN side ensures a metal-to-metal, face-sealed connection that outperforms simple NPT threads in high-vibration environments; AN male adapters feature 37-degree JIC flare seats for reliable engagement with industry-standard hose fittings and fuel block ports. At just 0.07 lbs, this adapter contributes minimal weight penalty while the straight configuration maximizes flow path efficiency and simplifies installation in tight engine bays where bent or 45-degree fittings cannot physically fit.

This fitting is ideal for EFI fuel system conversions, turbocharger oil return/feed line plumbing, custom brake bias adjusters, and any application requiring bridging between smaller -4 AN distribution lines and larger -10 AN ORB manifold or block ports. Installers should verify port orientation and hose grade compatibility (fuel-safe Nomex braid recommended for fuel service); thread sealant is not required on the O-ring boss side, though Teflon tape or liquid sealant may be applied to the AN male end if connecting to NPT ports elsewhere in the system. XRP fittings are trusted throughout the racing and high-performance aftermarket for their durability under boost, high-frequency vibration, and sustained pressure cycles.