Tomei Head Gasket Ej255/Ej257

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Head Gasket Ej255/Ej257 Category Engine Parts Number 101.0-0.7mm EJ25 TA4070-SB02A 101.0-1.0mm EJ25 TA4070-SB02B 101.0-1.2mm EJ25 TA4070-SB02C 101.0-1.5mm EJ25 TA4070-SB02D Descrip tions: Tomei began operations in 1968 as a race car tuner in Japan. Over the last 40 years Japan has emerged as one of the leaders in automotive research, racing, and culture. Tomei products have been utilized in nearly every motor sport imaginable. Tomei's racing heritage means their research and design team have first hand knowledge of the extreme demands racing puts on an engine. Using only the highest quality materials means that Tomei's products can handle the intense strain and heat a purpose built engine will experience whether it be on the street or the track. Tomei's attention to detail is second to none. All of their products are thoroughly researched and engineered to achieve optimal efficiency. Because of even miniscule differences in measurements can cause catastrophic engine failure, all Tomei products fall within strict tolerances. Tomei machines all of their engine components to enhance airflow and ensure proper fitment and seal. With the increase in combustion pressure from performance engines in recent years, the burden placed on the head gasket has grown tremendously. To maintain the highest precision possible in a high performance assembled engine strict measurements and maximum sealing is required with the right torque values on each head studs and bolts are required to keep everything together to gain the most out of your engine. When bolts are screwed into place, regardless of the bolt type and strength qualities of that bolt, the pressure is always on the first 3 threads of the screw which takes the most stress. If the cylinder block is badly distorted then the screw threads can be damaged as well. Stud bolts with dynamic designs allows the screw bolt to take on equal stress on all threads which will greatly secure maximum sealing pressure for race and airplane engines. Since the cylinder capacity can fluctuate with the thickness of gasket used, the compression ratio can be adjusted with the thickness of the gasket. The gasket thickness will help with the final adjustments to get your setting closest to the target compression ratio.Stainless steel was chosen as the head gasket material because of the heat conductivity efficiency of stainless steel to evenly distribute the heat and aid with cooling. This will greatly improve reliability and reduce the chances of a blown head gasket.The natural high tensile qualities of Stainless Steel greatly increases the joint rigidity of the cylinder head with the cylinder block. This helps minimize the chances of the engine warping when under severe stress loads that performance engines go through when running high power applications. The result is improved durability and added power gains. 1. TA4070-SB02A Features: Increased engine durability Greater heat resistance Improved reliability Stainless steel construction Fitments: Subaru STI 2004-2017 Subaru WRX 2004-2012 2. TA4070-SB02B Features: Increased engine durability Greater heat resistance Improved reliability Stainless steel construction Fitments: Subaru STI 2004-2017 Subaru WRX 2004-2012 3. TA4070-SB02C Features: Increased engine durability Greater heat resistance Improved reliability Stainless steel construction Fitments Subaru STI 2004-2017 Subaru WRX 2004-2012 4. TA4070-SB02D Features: Increased engine durability Greater heat resistance Improved reliability Stainless steel construction Fitments: Subaru STI 2004-2017 Subaru WRX 2004-2012 ***Proposition 65 WARNING: Cancer and Reproductive Harm Vehicle Fitments: Year Make Model Submodel 2008 Subaru Impreza 2.0R 2009 - 2010 Subaru Impreza 2.5 GT 2006 - 2011 Subaru Impreza 2.5i 2010 - 2011 Subaru Impreza 2.5i Premium 2012 Subaru Impreza Limited, Sport Premium, Premium, Base, Touring, Sport Limited 2005 - 2011 Subaru Impreza Outback Sport 2004 Subaru Impreza Outback, TS 2009 - 2012 Subaru Impreza R, WRX Premium 2004 - 2005 Subaru Impreza RS 2008 - 2012 Subaru Impreza Sport 2010 Subaru Impreza WRX GT, WRX SE, WRX STI Special Edition, 2.5i Limited 2006 - 2012 Subaru Impreza WRX Limited 2007 - 2012 Subaru Impreza WRX STI Limited 2006 - 2007 Subaru Impreza WRX TR 2004 - 2012 Subaru Impreza WRX, WRX STI 2011 Subaru Impreza XV Show more