Metco Motorsports MBR0013 2003-2004 Mustang Valve Cover Breather

This valve cover breather assembly replaces the original oil fill cap found on the driver's side valve cover on the supercharged Cobra and Shelby GT500 applications.

The base of the breather is CNC-machined from billet aluminum for a precise fit, and the included silicone O-ring is specially designed to prevent seepage at the base of the filter. The filter base is microfinished for surface protection and good looks, and is easily hand-polished to a mirror-like appearance. The removeable filter element is a high-quality, USA-made reusable unit, and the filter is securely retained to the filter base by a specially-machined retention groove in the top of the filter base.

The purpose of this valve cover breather is to vent unwanted accumulation of pressure in the crankcase, which serves to eliminate pumping losses and reduce oil temperatures. The installation of this breather will contribute to increased engine oil life and reduce the possibility of failed engine seals resulting from excessive crankcase pressure.

The included check valve will allow the breather to vent any crankcase pressure that accumulates, but it will not allow ambient air to be drawn back into the engine through the breather under high-vacuum conditions. This valve is beneficial for applications that retain a valve cover vent line, or applications with a very sensitive (or aggressively-lean) PCM calibration.

NOTES:

• NOT LEGAL FOR SALE OR USE IN CALIFORNIA