What does the .040 inch thickness mean for my engine?

The .040 inch thickness refers to the gasket's compressed height. This specific measurement is important for maintaining the correct compression ratio and valve-to-piston clearance in your EZ30D engine. It's designed to work with the factory specifications for your Subaru.

Is this gasket for the left or right side of the engine?

This Cometic head gasket (Part# C4623-040) is specifically designed for the left-hand side (LHS) of the EZ30D engine. You will need a separate gasket for the right-hand side.

What are the benefits of a Multi-Layer Steel (MLS) head gasket?

MLS head gaskets are well-built and offer excellent sealing capabilities, especially in engines that produce higher cylinder pressures and temperatures. They are designed to rebound and resist corrosion, helping to maintain a strong seal over time.

Specifications

Brand: Cometic Gasket
Part #: C4623-040
UPC: 191070117825

Cometic 04-09 Subaru EZ30D 3.0L 90mm Bore .040 inch MLS Head Gasket - Left

Name: Cometic 04-09 Subaru EZ30D 3.0L 90mm Bore .040 inch MLS Head Gasket - Left
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-04-09-subaru-ez30d-3-0l-90mm-bore-040-inch-mls-head-gaske-t14-317891
Price: 97.84 USD
Availability: BackOrder

$97.84

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 2003-2009 Subaru Outback. Cometic MLS head gasket for EZ30D 3.0L engine, 90mm bore, .040 inch thick (left side).

Key Features

Fits 2003-2009 Subaru Outback, 2006-2007 Subaru B9 Tribeca, and 2008-2009 Subaru Legacy.
Designed for the EZ30D 3.0L engine.
90mm bore size.
.040 inch thickness.
Multi-Layer Steel (MLS) construction for improved sealing.
Resists corrosion and maintains clamping force.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will it fit your car?

Fits these vehicles

Subaru B9 Tribeca 2006-2007
Subaru Legacy 2008-2009
Subaru Outback 2003-2009

About this part

Product Details

If you're rebuilding the top end of your 2003-2009 Subaru Outback's EZ30D 3.0L engine, a reliable head gasket is crucial. This Cometic Multi-Layer Steel (MLS) gasket is specifically designed for the left-hand side of your engine, featuring a 90mm bore and a .040 inch thickness. MLS gaskets are well-built to handle the increased pressures and temperatures common in modern engines, offering improved sealing performance.

Cometic makes these gaskets in the USA using materials sourced domestically. The multi-layer steel construction provides a strong seal that resists corrosion and can rebound to maintain clamping force even under demanding conditions. This gasket is a direct fit for your specified Subaru models, ensuring proper installation when you're putting your engine back together.