Subaru OEM 2.5L Head Gasket STI (2004-2007) Mercedes The turbulators are fully brazed

The turbulators are fully brazed to the entire internal length of the tube resulting in zero heat transfer barrier and high strength

which translates into a more intense explosion in the combustion chamber to create more horsepower and torque

Great stability

which are zinc coated for excellent wear and corrosion resistance

This rear exhaust section will bolt up to the factory mid-pipe and replace the factory rear muffler and tip assembly

Subaru OEM 2.5L Head Gasket STI (2004-2007) Mercedes The turbulators are fully brazedThe OEM Subaru EJ257 2004 2007 2. 5L STI head gasket is multi layered steel. Subaru 2. 5L engines built on 06 2006 and before require a different part number than 2. 5L engines built on 07 2006 and after. Note: Gaskets sold individually. 02 07 WRX STI stock head gaskets are . 6mm (. 023 in) thick. Please refer to your drivers side door jam to determine the build date of your vehicle.