Product Description
TA4070-SB02D
Fitment Information:
2006-2014 Subaru Impreza WRX
2004-2021 Subaru STi
Features:
101mm bore
1.5mm thickness
Multi-layered steel construction
Opposing bead type (topside recessed, underside raised)
Stopper type seal
Sold as a pair of two gaskets
Notes: If you are looking to build your Subaru to handle more power or rebuilding your blown up Subaru in general, these Tomei head gaskets are a fantastic addition to the build! MLS head gaskets are known to handle/hold power better than OE and will withstand a good chunk of power!
The factory gasket 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.
With each model change from Subaru engineers the improved engine design from the GC8 to GDB and A models had the 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 had a second look at the design of the rib height and the Super Grommet Design and they have achieved an overall improvement in overall seal.
They have made multiple thicknesses available to achieve your desired compression ratio for your application. Now you can build an engine with higher accuracy to suit your needs.
Tomei Subaru head gaskets are sold as a pair.
Usually ships same or next day. 
