Tomei MLS EJ25 Head Gasket 1.5 mm Thick 101mm Bore (Pair)

The factory type is made from metal but the design is the bead type which is not as effective in sealing as the super grommet design. Most aftermarket metal gaskets are of the grommet design which is better but the TOMEI Super Grommet design gives you the highest sealing efficiency possible and increased durability.

(Super Grommet=Dual Sealing System from bead structure and metal grommet)

Custom Rib Design (Improved Seal Around the Water Gallerie)
With each model change from Subaru engineers, the improved engine design from the GC8 to GDB and A models had increased the rib of the outer bore diameter which improved the gas sealing characteristics. But the results of that change made the water and oil galleries seal decrease. So when the power is increased there is also the increased possibility for oil and water leaks to occur. TOMEI engineers have a second look at the design of the rib height and the Super Grommet Design and we have achieved an overall improvement in the overall seal.

Various thicknesses are available to achieve your desired compression ratio for your application. Now you can build an engine with higher accuracy to suit your needs.

• ULTRA DURABLE, HIGH-PERFORMANCE HEAD GASKETS
• HIGHLY OPTIMIZED, ENGINE SPECIFIC CONSTRUCTION
• MADE USING PREMIUM GRADE MATERIALS AND COATINGS
• PRECISION WATER/OIL ROUTE SEALS
• MULTIPLE THICKNESSES FOR CR ADJUSTMENT