1qt Breather Tank w/6an Inlet Black Polyethylene

The MOROSO 1qt Breather Tank with 6AN Inlet in Black Polyethylene (MPN 85406) is a precision-engineered overflow recovery system designed for high-performance engines operating under extreme conditions. Built to capture and contain crankcase vapors and excess coolant overflow, this breather tank prevents fluid loss on the track, at the dyno, or during sustained high-rpm operation where standard systems fail. The compact 1-quart capacity paired with a direct 6AN bulkhead inlet connection provides straightforward plumbing integration without requiring expensive adapter fittings.

Measuring 3.125 inches in diameter by 10.5 inches in height, this polyethylene tank weighs just 1.12 lbs and installs via bolt-on mounting, eliminating welding or custom fabrication. The included breather element reduces pressure spikes while the petcock drain valve allows convenient fluid evacuation between runs or routine maintenance. Black polyethylene construction resists corrosion and UV degradation, holding up through repeated heat cycles and outdoor storage. The 6AN inlet threads directly into AN-equipped manifolds or custom lines, ensuring leak-free operation under boost or vacuum conditions.

This breather tank suits street-legal high-performance builds, drag racing applications, marine engines with crankcase pressure management, and any forced-induction setup where factory overflow systems are undersized. Serious engine builders and tuners rely on dedicated catch tanks to prevent oil contamination of intercoolers, radiators, and intake tracks. MOROSO's reputation for quality motorsports hardware makes this tank a trusted choice for builders who refuse compromise on system reliability during maximum-effort operation.

The bolt-on design means no permanent modifications to existing engine bay plumbing. Drain the tank, disconnect the inlet line, and remove four fasteners to service or replace. For anyone stepping up from open-loop crankcase ventilation to a controlled recovery system, the MOROSO 1qt breather tank delivers OEM-level engineering at a price point that reflects real value rather than marketing premium.