Crankcase Evac System w/ Billet Push-In Breathers

The Crankcase Evac System w/ Billet Push-In Breathers from MOROSO (MPN 68866) is a precision engine ventilation solution designed to control crankcase pressure and prevent oil blow-by in high-performance and modified engines. This weld-on evacuation system is engineered for street rods, race cars, and serious enthusiasts who demand reliable crankcase management under demanding conditions. Proper crankcase evacuation extends engine life, improves ring seal integrity, and reduces oil contamination—making this system essential for any engine running elevated boost, nitrous, or sustained high RPM operation.

This system features billet aluminum push-in breathers that provide superior flow characteristics and a clean, professional appearance compared to standard rubber grommets. The kit includes all necessary components—breathers, check valves, fittings, and mounting hardware—to create a complete evacuation circuit. Steel and aluminum construction ensures durability and compatibility with both natural aspiration and forced-induction setups. The system accommodates 5/8-inch diameter hose, a standard size that pairs with virtually any aftermarket piping system, and the weld-on design allows for permanent, secure mounting directly to the block or pan for maximum reliability during aggressive driving.

Street rod builders, engine builders, and turbocharged enthusiasts benefit most from this comprehensive evacuation package, particularly those running custom engine combinations where OEM crankcase systems are inadequate. Installation requires welding to the block or pan and basic hose routing; the included fittings and check valves eliminate backpressure while preventing atmospheric moisture from entering the engine. At 1.78 lbs with compact dimensions (5.7 x 4.5 x 6 inches), the system fits tight engine bays while delivering measurable improvements in ring blow-by, oil consumption, and overall engine health. This is a professional-grade component for builds where engine longevity and performance are non-negotiable.