Black Rubber Plugged Breather Grommet for Steel Valve Covers

• Solid plugged rubber grommet seals an unused valve cover opening completely

• Sized for a 1" ID opening with a 1 1/4" OD and 1/8" groove width

• Fits steel valve covers with a matching 1" breather-style opening

• Sold individually — caps an unused hole without a breather or PCV valve installed

The Black Rubber Plugged Breather Grommet for Steel Valve Covers is a solid, plugged grommet that seals off an unused breather or PCV opening in a compatible steel valve cover, rather than passing a breather or PCV valve through it. Black rubber construction is sized for a 1" inside diameter opening, 1 1/4" outside diameter, and 1/8" groove width.

This grommet is commonly used when a valve cover opening isn't being used for a breather or PCV valve — for example, when ventilation is routed through the other valve cover instead — and needs to be sealed rather than left open.

Verify your valve cover opening matches the 1" ID / 1 1/4" OD / 1/8" groove sizing before ordering, since grommet sizing varies between valve cover styles and manufacturers.

Applications
Fits steel valve covers with an unused breather or PCV opening sized to 1" ID, 1 1/4" OD, with a 1/8" groove width.

Specifications
Solid, plugged black rubber construction — no passthrough for a breather or PCV valve. Inside diameter 1", outside diameter 1 1/4", groove width 1/8". Sold individually.

What does this grommet do?
It plugs an unused breather or PCV opening in a valve cover, sealing it completely rather than allowing a breather or PCV valve to pass through.

What size opening does this grommet fit?
This grommet is designed for a 1-inch inside diameter opening, 1¼-inch outside diameter, and 1/8-inch groove width, making it suitable for compatible valve cover openings.

When would I need a plugged grommet instead of a regular one?
Use this grommet when a valve cover opening is not being used for crankcase ventilation—for example, if your breather or PCV valve is installed on the opposite valve cover—and the unused opening needs to be completely sealed.

What is this grommet made from?
This grommet is manufactured from black rubber, providing flexibility, durability, and resistance to oil and engine heat.

Does this come with a breather or valve cover?
No. This listing is for one replacement plugged grommet only. A breather, PCV valve, and valve cover are not included.

What's the difference between this and the regular passthrough grommet with the same dimensions?
This grommet is a solid plug that completely seals the opening. The passthrough version shares the same 1-inch inside diameter, 1¼-inch outside diameter, and 1/8-inch groove width, but is designed to accept a breather or PCV valve through the center.

Does this grommet affect emissions compliance?
No. This product does not affect vehicle emissions and is not subject to emissions compliance regulations.