Cometic Gaskets from JDMuscle

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Cometic
Head Gasket
Fits: 07-13 Mazdaspeed3

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Cometic
Street Pro Gasket Kit
Fits: 08-18 STI

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$37674~~$405.09~~ Save $28.35

Pay over time · Est. $11.77/payment

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Cometic
93mm Bore Head Gasket - EJ20
Fits: 02-05 WRX

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Cometic
100mm Bore Head Gasket WRX/STI EJ25 Models

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Cometic
Head Gaskets Mazda Miata 1.8L BP 1994-1997

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Cometic
Street Pro Gasket Kit Without Head Gasket
Fits: 04-06 Subaru EJ257

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Cometic
87.5mm .051 inch MLS Head Gasket Acura RSX 2002-2006 / Civic 2002-2005 / CR-V 2003-2006 | C14039-051

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$9652~~$107.24~~ Save $10.72
Cometic
Head Gasket EJ22ET MLS 98MM .051 Subaru Legacy Sport 1991-1994 | C4263-051

$6200
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Cometic
Head Gaskets 4G63
Fits: 90-99 Mitsubishi Eclipse

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Cometic
Complete Gasket Kit | PRO2046C
Fits: 08 WRX

$35714~~$384.01~~ Save $26.87

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Cometic
Subaru EJ22/25 Hybrid Motor DOHC 16V 100mm Bore .040 Inch Thick MLS Head Gasket

$5183~~$57.59~~ Save 10%
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Cometic
Honda K20/K24 2003-2006 CR-V / 2003-2007 Accord / 2002-2005 Civic / 2003-2011 Element 87mm Head Gasket .030 inch MLS Head Gasket

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$9652~~$107.24~~ Save $10.72
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Cometic
Turbo / BP-Z3 85mm Bore .036 inch MLS Head Gasket Mazda Miata BP-4W 2001-2005 | C4984-036

$10857~~$120.63~~ Save $12.06
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Cometic
Subaru FB25B .028in 95.5mm Bore MLX Cylinder Head Gasket - RHS | C14155-028

$7663~~$85.13~~ Save 10%
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Cometic
Subaru FB25B .028in 95.5mm Bore MLX Cylinder Head Gasket - LHS | C14156-028

$7663~~$85.13~~ Save 10%
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Cometic
Subaru FB20B/FB20X .028in 85.7mm Bore MLX Cylinder Head Gasket - RHS | C14157-028

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$7663~~$85.13~~ Save 10%

The best head gaskets for a Subaru WRX or STI engine build are multi-layer steel (MLS) gaskets from Cometic, sized to your bore and offered in several thicknesses so you can fine-tune compression. Cometic MLS gaskets seal reliably under boost where stock-style gaskets can fail, which is why they are the go-to choice for turbocharged EJ and FA engine builds.

Cometic is one of the best-known names in performance sealing. An MLS head gasket is built from several embossed stainless steel layers that conform to minor surface imperfections and maintain a seal through heat cycles and cylinder pressure. When shopping, match the gasket bore to your piston bore, pick a thickness that gives you the compression ratio you want (thicker lowers it), and plan on fresh head bolts or studs any time the heads come off.

This collection covers Cometic head gaskets and full Street Pro gasket kits for the Subaru WRX/STI (EJ20 and EJ25), Mazda Miata BP 1.8L, Mazdaspeed3, and Subaru Legacy Sport, among others. Pair a gasket refresh with ARP Fasteners & Hardware head studs for even clamping load, and while the engine is apart, check ACL Race Series Bearings, King Engine Bearings, and Wiseco pistons to complete a rebuild. For background on the engine these gaskets serve, read our guide: Subaru EJ257 Engine: Everything You Need To Know.

Cometic Gasket FAQ

What is an MLS head gasket?

Multi-layer steel: several embossed stainless steel layers that seal under high cylinder pressure and heat. It is the standard upgrade for turbocharged and high-compression builds.

Do I need a new head gasket when rebuilding my engine?

Yes. Head gaskets are single-use — always install new ones any time the cylinder heads come off, even if the old gaskets look fine.

How do I choose the right bore size?

Match the gasket bore to your piston bore. If you are unsure, check your engine's specs and your year and model before ordering.

Should I run head studs with a Cometic gasket?

For boosted builds it is strongly recommended — quality studs provide more even, repeatable clamping than stock bolts. Keep torque specs and sequence from the manufacturer.