Valve Cover Breather for Ford Mustang GT 4.6L and 5.0L

This valve cover breather is installed in place of the oil filler cap, no modifications to the vehicle are required.

The precision-machined spiral in the base of the housing fits snugly into the filler tube, and the seal is held in place by the included O-ring.

In supercharged engines, combustion pressure inevitably leaks into the crankcase, and this pressure contributes to loss of power, increased oil temperatures, and premature failure of engine seals.
The breather acts as a high flow vent to allow the resulting pressure to easily escape into the atmosphere.

This breather is equipped with a patented APV check valve, so that internal pressure is allowed through, but no outside air can be sucked through the breather into the engine's intake tract.
This vent reduces the effectiveness of the vehicle's PCV system and is not emissions compliant.
Your engine tuning will not be affected by installing this breather.

This valve cover breather is CNC machined from aluminum and micro-machined on the outer surface.
The filter is a high quality, reusable unit manufactured in the USA by S&B Filters.

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