Metco Motorsports Billet Valve Cover Breather 1997 and Newer LS1/LS2/etc, LT4, 1989 Turbo Trans Am, Pontiac G8, Ecotec
681-MBR0003
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Direct Fit Application
This valve cover breather assembly replaces the original oil fill tube on the passenger side factory valve cover. The base is CNC-machined from billet aluminum for precise fit, and the included silicone O-ring is specially designed to prevent oil seepage at the base of the breather. The filter base is microfinished for surface protection and good looks, and is easily hand-polished to a mirror-like appearance. The removable filter element is a high-quality reusable unit from S & B Filters, which is securely retained in the filter base by a specially-machined retention groove in the top of the base.
The purpose of this valve cover breather is to vent unwanted accumulation of pressure in the crankcase, and to provide maximum circulation of ambient air in the crankcase to 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. This breather may reduce the effectiveness of the vehicle's PCV system, and it is not emissions-legal.
Note 1: On LSx applications, this breather can be installed in place of the OEM oil cap on top of the factory oil fill tube. With this installation, the factory engine cover (if equipped) can be retained. Our breather can also be installed directly in the factory valve cover without the fill tube for a cleaner look, but there will be interference with the engine cover.
Note 2: This breather stand is also available with a male #10AN connection at the top instead of the provision for the breather element. This configuration is designed for use in a custom crankcase evacuation system or for use with a vacuum pump. Please see Metco Motorsports PN MBR0003-10AN, listed elsewhere in this section. If your vehicle is equipped with aftermarket valve covers using a screw-in thread, please see the MBR0015 breather, also listed elsewhere in this section.
Note 3: Early LS valve covers have only one locating tab in the oil fill tube. With just one tab, the breather can rock slightly when installed. This slight movement is not an issue and the breather will not leak at the base. Later LS covers have two tabs to positively position the breather.
Specifications:
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.