Crankcase Evacuation System

The Crankcase Evacuation System (SKU ALL 34145) is a weld-on breather kit engineered to manage positive crankcase ventilation in high-performance and racing engines. This steel construction system reduces backpressure and prevents crankcase blow-by by routing gases safely away from the engine block, a critical function in forced-induction and modified powerplants where standard OEM ventilation is insufficient.

The kit includes breathers, grommets, check valves, and nipples—all the core components needed for a complete crankcase evacuation setup. The system is designed for universal fitment and requires 5/8-inch diameter hose connections, a standard size widely available from performance and marine suppliers. The weld-on mounting design provides a permanent, vibration-resistant installation suitable for street engines, race applications, and marine powerplants. Weighing 1.64 lbs and compact at 5.4 x 3.35 x 6.8 inches, the assembly integrates cleanly into confined engine bays without excessive bulk.

This crankcase evacuation system serves engine builders, performance enthusiasts, and marine mechanics who need reliable blow-by management on modified or high-horsepower applications. Street rodders, off-road truck builders, and racing teams rely on proper crankcase ventilation to extend engine life, prevent oil sludge buildup, and maintain ring seal integrity. The steel construction and universal design make it a practical choice for custom builds where OEM breather systems are inadequate or incompatible.

Proper crankcase evacuation is fundamental to engine longevity and performance. Without adequate ventilation, pressure accumulates in the crankcase, forcing oil past seals and degrading bearings. This weld-on kit addresses that directly, making it a core component in any serious engine modification or racing program.