Breather Grommet

The Moroso Breather Grommet is an essential engine ventilation component designed for automotive enthusiasts and professional builders who demand reliable crankcase pressure management. This precision-engineered grommet serves as a critical seal point in engine breather systems, allowing controlled venting of crankcase gases while preventing oil mist and contaminants from escaping unfiltered. Whether you're running a street machine, weekend racer, or high-performance build, proper breather system integration is fundamental to engine longevity and consistent performance.

Manufactured by Moroso, a leader in engine dress-up and ventilation solutions, this breather grommet is engineered to provide a secure, leak-free seal where breather hoses connect to engine blocks or timing covers. The grommet's durable construction ensures it withstands repeated thermal cycles, engine vibration, and exposure to oil vapors without degradation or slippage. Its compact design—measuring 3.7 by 1.55 by 5 inches and weighing just 0.08 lbs—allows for seamless integration into tight engine bay layouts while maintaining the structural integrity of your breathing system's critical junction points.

Builders upgrading traditional open breather systems to catch-can or closed-loop configurations will find this grommet indispensable for securing hose connections and eliminating leaks that compromise crankcase ventilation efficiency. Installation is straightforward—simply press the grommet into position at the breather port, then insert your hose for a positive, vibration-resistant fit. Compatible with most small-block and big-block engine applications where standardized breather port sizing is used, the Moroso Breather Grommet delivers dependable performance across a wide range of engine builds and modifications.