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Moroso screw-in valve cover breathers, GM COPO style with 3/4-inch tube size, supplied as a two-pack. These screw-in breathers provide a sealed threaded mounting for valve cover ventilation and accept 3/4-inch tubing, offering a simple, serviceable vent solution for GM valve covers in applications that use external breather plumbing.
Moroso GM COPO 3/4in Tube Screw-In Valve Cover Breathers (2 Pack)
