SKU: RHP823-04-04-1
UPC: 810465013633
MPN: 823-04-04-1
The REDHORSE PERFORMANCE 823-04-04-1 is a 45-degree male adapter that ties a 4AN hose end into a 1/4 in. pipe-thread port. Builders reach for this fitting when a straight connection won't clear an obstruction and a routing change is needed to keep lines tidy. It suits fuel delivery, oil feed, and hydraulic plumbing where the inlet sits at an awkward angle. The 45-degree bend lets you turn a hose run away from headers, brackets, or tight engine bay real estate without kinking the line. Browse the full range of adapter fittings when you're matching ports across thread standards.
This adapter is machined from 6061 T-6 aluminum and wears a blue anodized finish, per Redhorse specifications. One end carries 4AN (-04) male threads to mate with a hose end or coupler; the other end terminates in a 1/4 in. male pipe thread for sealing into a tapped port. The 45-degree geometry is fixed, so the angle holds its orientation once torqued, though clocking is set by how the pipe thread seats. Aluminum keeps the weight low for components hanging off a fuel rail or pump, and the anodized layer resists corrosion from pump gas, ethanol blends, and oil. Redhorse backs the fitting with a lifetime warranty against manufacturing defects. Seal the pipe-thread side with thread sealant rated for the fluid you're running.
Reach for this fitting on custom fuel systems, remote oil cooler lines, and pressurized fluid routing where a factory port uses pipe thread and your plumbing runs 4AN hose. The 45-degree turn earns its place in cramped bays where a straight adapter would force a sharp hose bend. Pair it with matching 4AN hose ends and unions to build a clean run from pump to rail. For longer assemblies, our hose selection and 4AN union fittings round out the build. The whole fittings, hoses, and valves category carries the caps, plugs, and tees that finish a system.
It joins a 4AN (-04) hose-side connection to a 1/4 in. male pipe-thread port at a 45-degree angle. The AN end mates with a 4AN hose end, coupler, or union, while the pipe-thread end seals into a tapped female port on a fuel rail, pump, or block.
Yes. The pipe-thread side relies on a tapered seal, so apply a thread sealant or PTFE tape rated for the fluid you're running, whether that's pump gas, ethanol blends, or oil. The 4AN side seals on its own flare and does not need sealant.
It is machined from 6061 T-6 aluminum with a blue anodized finish, per Redhorse Performance specifications. Aluminum keeps weight down for components hanging off a fuel rail or pump, and the anodized layer adds corrosion resistance.
The 45-degree bend lets you route a hose away from headers, brackets, or other obstructions without forcing a sharp kink in the line. It's the right call when the port sits at an awkward angle relative to the hose run.
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