Valve Cover Breathers 2pk GM COPO Replacements

The Valve Cover Breathers 2pk GM COPO Replacements from Moroso are essential components for crankcase ventilation specifically designed for GM COPO engines. These breathers are crucial for maintaining engine performance, especially in applications with aggressive cam profiles or elevated boost levels.

These breathers allow pressurized gases to escape the crankcase while preventing oil sludge buildup, ensuring proper engine breathing under sustained load. The two-pack configuration enables simultaneous replacement of both driver and passenger side breathers, promoting balanced crankcase pressure management across the engine.

Ideal for mechanics and enthusiasts, these replacement breathers are straightforward to install—simply unbolt the OEM breathers and thread in the Moroso units. They are compatible with GM COPO models, making them a reliable choice for those upgrading or maintaining their performance engines.