Tomei Head Gasket EJ20# GC8 GDB WRX

Higher Compression, The Perfect Seal, Prevent Problems With This Easy Upgrade.

Tomei has been well known for the high quality engine internal products. Especially with their multi layered metal head gaskets. The technological advancement of performance engines and even more so from tuned engines will increase the burden of stress on the head gasket. Under extreme conditions of high cylinder pressures and competition use, the head gasket is often the weakest point. The sealing performance is pursued with cross-section measurements and utilizing various functions within the design.
 
       
SUPER GROMMET DESIGN
Although the stock product is metal, yet the sealing performance is limited due to the bead type design. Most aftermarket products being sold are made by metal materials, but they use the simple grommet type design. The sealing performance has been improved considerably with the super grommet, to suit these engines and has been proven to deliver excellent reliability. (Super Grommet = Dual Seal Method combining both the Bead Structure & Metal Grommet designs).

BEAD TYPE
The bore circumference, coolant and oil seals are all sealed well with the bead configuration.    

GROMMET TYPE
The metal grommet style situated around the bore circumference increases high-pressure sealing characteristics.    

SUPER GROMMET TYPE
The dual sealing method of the bead structure & metal grommet, provides maximum sealing for the coolant, oil & gases around the bore circumference.

APPLICATION SPECIFIC RIB DESIGNS
The gas sealing characteristics will improve with the raised rib, but the sealing characteristics of the neighbouring water and oil channels are equally reduced. Therefore when pushing for power gains, these areas are weak points that can allow leakages. The TOMEI design focuses on all areas to provide the maximum seal with the use of the super grommet design. By using the rib height to ensure an equal overall high surface pressure seal, where it's needed the most.

SIZE OPTIONS
Please select your required Gasket size from the list below.

NOTES:
These Head Gaskets are application specific. If you have any questions about this product, please feel free to contact our staff here at TokyoSeven.com for professional assistance.

APPLICATION:

Subaru EJ20# GC8/GDB JDM + 02-05 WRX USDM