Cometic MLS Head Gasket (Single)
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Cometic MLS Head Gasket (Single) – Subaru EJ25 (to 2006) – 100mm Bore
The Cometic MLS Head Gasket is a multi-layer stainless steel replacement for the factory head gasket on Subaru 2.5L EJ25 engines up to 2006: the EJ25D, EJ251, EJ252, EJ253 and EJ255 Version 1, and the 2004–2006 EJ257 from the GD Impreza WRX STI. It has a 100mm round bore and comes in a choice of compressed thicknesses, so you can match the stock deck height or set the compression ratio on a rebuilt engine.
Cometic's MLS (multi-layer steel) gasket is built from embossed stainless steel layers, with high-temperature coated outer layers that seal against the head and block. Because the overall thickness comes from the centre layer, Cometic can offer many thicknesses, which makes MLS the go-to for setting compression ratio or squish on a built engine.
Options
Compressed thickness: 0.76mm (.030"), 1.14mm (.045"), 1.52mm (.060"). Thicker gaskets lower compression; match the thickness to your engine builder's spec.
Note: Sold individually – an EJ engine needs two, one for each head. For EJ255 and EJ257 engines from 2007, choose the 101mm Version 2 gasket instead. Installation by a professional is recommended.
Features
- Cometic MLS multi-layer stainless steel construction
- Embossed, high-temperature coated outer layers seal against the head and block
- 100mm round bore
- Choice of compressed thickness to suit stock or built engines
- Installed dry – no sealant needed
Kit Contents
- 1 x Cometic MLS cylinder head gasket
Need help confirming fitment? Contact our team at sales@chicaneaustralia.com.au.
Product
- Brand
- Cometic
- Part number(s)
- C4264-030, C4264-045, C4264-060
Details
- Product
- MLS cylinder head gasket
- Construction
- Multi-layer stainless steel (MLS)
- Engine
- Subaru EJ25D, EJ251, EJ252, EJ253 and EJ255 Version 1, and EJ257 2004–2006
- Bore
- 100mm, round
- Compressed thickness
- 0.76mm (.030"), 1.14mm (.045"), 1.52mm (.060")
- Layers
- 3 layers at 0.76mm; 3 layers at 1.14mm; 5 layers at 1.52mm
- Sold as
- Single gasket (two needed per engine)
Contents
1 x Cometic MLS cylinder head gasket (100mm bore)

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