Adapter Fitting GM LS OEM PCV to 10an Male

The Adapter Fitting GM LS OEM PCV to 10AN Male by EARLS is a precision engineered adapter designed for custom cooling and crankcase ventilation systems on GM LS-series engines. This straight adapter connects OEM 3/4-inch PCV ports to modern 10 AN male fittings, making it essential for builders upgrading their LS engine's breather system with aftermarket hoses and components. Whether you're building a street rod, performance engine, or custom vehicle, this adapter bridges the gap between factory PCV dimensions and contemporary braided line standards.

Constructed from lightweight aluminum and finished in black anodize, the fitting delivers corrosion resistance and a professional appearance in engine bays. The straight-port design eliminates flow restrictions and turbulence, promoting efficient crankcase evacuation while maintaining system pressure. EARLS' quality manufacturing ensures precise internal and external threads that create leak-free connections, critical when routing pressurized vapors away from the engine. The compact 2.25 x 1.35 x 2.35-inch profile allows flexible routing in tight engine compartments common in hot rods and restomod projects.

This adapter suits LS engine builders, vintage car restorers, and performance enthusiasts standardizing their PCV systems on quality hose fittings. Direct fitment to GM LS-series engines—including LS1, LS2, LS3, and related variants—eliminates custom fabrication and simplifies installation. Pair it with matching 10 AN hoses and fittings to create a complete, professional-grade breather system that reduces engine wear and maintains crankcase vacuum. At just 0.07 lbs, the minimal weight impact makes it ideal for weight-conscious builds while its durable aluminum construction withstands extended use in high-heat engine environments.