12an Female Fitting Non- Weld w/Baffle

The 12AN Female Fitting Non-Weld w/Baffle from MOROSO is a precision valve cover bung engineered for high-performance engine builders and motorsports professionals who demand reliable crankcase ventilation management. This bolt-on fitting serves as a critical component in custom fabrication work, allowing technicians to route blow-by gases safely without permanently welding ports closed. Whether you're building a race engine, restoring a vintage performance platform, or designing a custom air management system, this 12 AN female connector provides the flexibility and durability required in demanding automotive environments.

Constructed from lightweight aluminum in natural finish, the 12AN Female Fitting features an internal baffle design that minimizes turbulence and oil carryover in crankcase ventilation lines. The 2.25-inch outer diameter allows proper seating and bolt-down security without fouling ancillary engine bay components, while the baffle chamber separates liquid from vapor—critical for maintaining clean intake charge and protecting downstream components. The non-welded design means this fitting can be installed, removed, and repositioned without permanently altering engine block geometry, making it ideal for prototype development, race testing, and customer-specific applications where repeatability and serviceability matter.

Technicians, fabricators, and engine builders specializing in LS, big-block, and exotic platform modifications rely on this fitting for seamless integration into custom header and intake manifold packages. The 12 AN female port accepts industry-standard 12 AN hose ends and fittings, ensuring compatibility with professional-grade braided stainless hose and aftermarket catch-can systems. Lightweight at just 0.25 pounds, it contributes minimal parasitic weight while maintaining structural integrity under boost and high-RPM conditions—a trusted choice for road racing, drag racing, and street performance builds where reliability and precision engineering are non-negotiable.