Tomei Cylinder Head Gasket RB20DET 80.5-1.5mm TA4070-NS07B

A dependable head gasket is essential when building or refreshing a Nissan RB20DET. The Tomei Cylinder Head Gasket (part number TA4070-NS07B) is a multi-layer metal gasket designed for the RB20 engine, featuring an 80.5 mm bore and 1.5 mm thickness. This mid-range thickness option is frequently chosen for performance applications that require a balance between compression control and reliable sealing under elevated boost and temperature.

Factory head gaskets can become a limiting factor once cylinder pressures increase. Tomei’s design incorporates reinforced sealing around the combustion chambers and precisely engineered water and oil passages, delivering improved resistance to blowouts and more consistent long-term performance compared with standard gaskets. The 1.5 mm thickness provides builders with flexibility when setting final compression ratio in conjunction with specific pistons and deck heights, making it a practical choice for both street and higher-output RB20DET projects.

At Terra Firma Automotive, we supply this genuine Tomei 80.5-1.5 mm head gasket for Skyline owners running the RB20DET. Whether you are assembling a refreshed engine or preparing a more aggressive turbo setup, this gasket offers the durability and precision expected from Tomei’s Japanese engineering. Choose Terra Firma Automotive for authentic components that form a solid foundation for your RB20 build.

 

• Genuine Tomei Cylinder Head Gasket
• Part Number: TA4070-NS07B
• Application: Nissan RB20DET / RB20DE
• Bore size: 80.5 mm
• Thickness: 1.5 mm
• Multi-layer metal construction
• Reinforced combustion chamber sealing
• Precision water and oil passage design
• Suitable for street and performance builds
• Allows compression ratio adjustment
• Improved resistance to heat and cylinder pressure
• Direct fit for RB20-powered Skyline models
• Stronger alternative to factory head gaskets
• Trusted Japanese performance component
• Available from Terra Firma Automotive