Valve Cover Breather w/ Media for V/C w/1.2 Hole

The Valve Cover Breather with Media for V/C with 1.2 Hole is essential engine breathing hardware designed to manage crankcase pressure and reduce oil vapor emissions in performance and street engines. As a seasoned mechanic, you know that positive crankcase ventilation (PCV) systems prevent pressure buildup that can compromise seals, gaskets, and overall engine durability. This Moroso unit addresses that critical need by filtering contaminants while allowing pressurized gases to vent safely, making it ideal for both stock rebuilds and modified powerplants that demand reliable crankcase management.

Engineered with integrated media filtration, this valve cover breather traps oil mist, moisture, and particulates before they reach the intake or atmosphere. The 1.2-inch hole specification matches common valve cover port diameters, ensuring proper fitment without adapter complications. Moroso's reputation for precision manufacturing means consistent flow characteristics and long-term reliability under elevated engine temperatures and vibration—critical factors when dealing with naturally aspirated or forced-induction setups that generate significant crankcase volumes. The compact 4.5 x 4.5 x 5.5-inch profile allows flexible mounting on engine bays with tight packaging constraints.

This breather assembly suits engine builders, restoration enthusiasts, and tuners who refuse to compromise on air quality or pressure control. It performs equally well on carbureted street cars, fuel-injected platforms, and modern turbocharged applications where crankcase evacuation directly impacts ring sealing and bearing longevity. Installation is straightforward—simply connect to your valve cover's 1.2-inch port using appropriate hose or tubing. Whether you're freshening a classic big-block or upgrading breathing efficiency on a modern crate engine swap, the Moroso Valve Cover Breather with Media delivers proven filtration and durability at a sensible weight of 0.96 lbs, adding minimal mass while maximizing engine health and longevity.