Alum. Breather Tank w/-12an Fitting

The MOROSO Aluminum Breather Tank with -12AN Fitting (MPN 85461) is a compact, purpose-built crankcase ventilation solution designed for custom engine builds, high-performance applications, and motorsports where clean air management is critical. This 1-quart capacity breather tank separates oil mist from incoming air before returning it to the engine, protecting internal components from moisture and carbon contamination while maintaining proper crankcase pressure.

Measuring 3.125 inches in diameter and 11.5 inches tall, this aluminum breather tank features a bar-mount design for easy installation in tight engine compartments. The -12AN male inlet connection accepts standard braided hoses and adapts seamlessly to existing fuel system fittings, while the integrated petcock drain allows operator-controlled oil recovery. The included breather filter prevents contaminants from entering during the ventilation cycle. Natural aluminum construction provides corrosion resistance and visibility of internal oil levels, with total assembled weight of just 1.45 pounds—minimizing parasitic weight on engine builds where mass matters.

This breather tank is essential for closed-loop crankcase systems in street rods, drag racing platforms, marine engines, and forced-induction builds where positive crankcase ventilation must meet emissions or performance standards. MOROSO has engineered this unit to handle sustained operation without oil carryover, making it equally suited for weekend track duty and high-horsepower street applications. The bar-mount configuration integrates with common engine bay structures, and the -12AN standard ensures compatibility with a broad range of plumbing configurations and aftermarket fuel and coolant components.