Siruda Stopper Metal Head Gasket Subaru WRX STI (GD) EJ257

Siruda Stopper Metal Head Gasket - Subaru WRX STI (GD) - EJ257

The Siruda stopper metal head gasket is a multi-layer steel (MLS) head gasket for the EJ257 engine in the 2005-2007 Subaru WRX STI (GDB). It is made for rebuilt and modified engines where the head seal has to hold more cylinder pressure than a factory gasket.

Choose the thickness to suit your build. It comes in a 101 mm bore and thicknesses of 1.1 mm, 1.3 mm or 1.6 mm. A thicker gasket lowers compression and adds piston-to-head clearance, so measure deck height and set the thickness with your engine builder. The thickness shown is Siruda's figure at the combustion seal; the body thickness is in the specifications.

Siruda's stopper design adds a stopper layer sandwiched between the steel layers around each bore. It keeps the combustion seal stable under engine vibration, and the compact seal suits engines with little room around the combustion chamber.

Note: Sold individually: this engine needs two, one for each cylinder head. Installation by a professional is recommended. Engine internals must be measured and set up by a qualified engine builder.

Features

• Multi-layer steel (MLS) construction
• Stopper layer between the steel layers around each bore
• 101 mm bore
• Choice of thickness: 1.1 mm, 1.3 mm or 1.6 mm
• Suits stock and built engines

Also available: Cometic MLS Head Gasket (Single) – Subaru EJ255 / EJ257 (2007–2018) – 101mm Bore.

Pairs Well With

• Siruda Exhaust Manifold Gasket - Subaru WRX / WRX STI (GC8 / GD / GE / GH / GR / GV / VA) / Forester (SF / SG / SH) - EJ Series
• GSC Power-Division Beehive Valve Spring & Titanium Retainer Kit - Subaru EJ20/EJ257
• CP Pistons Forged Pistons – Subaru EJ257
• Siruda Turbo Pipe Gasket - Subaru WRX / WRX STI (GD / GE / GH / GR / GV / VA) / Forester XT (SG / SH) - EJ255 / EJ257

Shop more: Siruda

Need help choosing parts? Contact our team at sales@chicaneaustralia.com.au.