Tomei 101mm Bore Head Gasket (Subaru STI EJ25 04-12) 0.7mm Thick
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 expansion and 3D pressure image shown, displays the effectiveness of the TOMEI multiple layered head gasket with the super grommet design (shown with the pressure image analysis ystem). The sealing performance is pursued with cross-section measurements and utilizing various functions within the design.
Super Grommet Design
Specific Rib Designs
The tomei head gasket held up great on my built made 551hp on my ej25 and held great. Shipping and customer was excellent. Will definitely order from map and hopefully Tomei makes a headgasket for my s2000 f22 cause I'll use this product when I build my s2k