4AN Male to 4AN Female 45Deg Black

The 4AN male to 4AN female 45-degree black fitting from REDHORSE PERFORMANCE is an essential component for any custom fuel, oil, or coolant line routing in high-performance automotive builds. Whether you're plumbing a fuel system upgrade, installing a turbo kit, or rerouting hydraulic lines around engine bay obstacles, this adapter allows you to change flow direction at a 45-degree angle without sacrificing connection security. Mechanics and enthusiasts rely on these fittings to navigate tight engine compartments while maintaining system integrity under pressure and temperature cycling.

This fitting uses industry-standard 4AN SAE port sizing, compatible with all common -4 hose and hard-line assemblies used in street and racing applications. The 45-degree geometry reduces stress on connected tubing by spreading loads across two planes rather than forcing sharp bends, which extends hose life and reduces leak points in aggressive temperature environments. Black anodized aluminum construction resists corrosion and provides visual consistency with modern engine bay aesthetics while maintaining the durability required for motorsport duty. The male-to-female design allows stackable configurations, giving you layout flexibility in cramped spaces where 90-degree fittings won't fit.

This adapter is invaluable for fuel system modifications, turbocharger installations, and oil cooling setups on LS swaps, Miata builds, and late-model performance platforms where factory routing isn't compatible with upgrades. Install using standard SAE AN wrench sizes and PTFE thread tape or compatible sealant; the compact 2.5-inch length minimizes clearance conflicts in tight quarters. Pair with matching -4 hose assemblies and compression fittings for leak-free performance under boost or high coolant flow conditions.