When building a high-boost or high-compression Nissan RB25DET, gasket thickness becomes an important tuning variable. The Tomei Cylinder Head Gasket (part number TA4070-NS06C) is a multi-layer metal gasket designed specifically for the RB25 engine family, featuring an 87.0 mm bore and a 1.8 mm thickness. This thicker option is commonly selected when builders need to lower static compression ratio for elevated boost levels or to accommodate specific piston and deck height combinations.
Factory head gaskets can struggle once cylinder pressures and temperatures rise significantly. Tomei’s design uses reinforced sealing around the combustion chambers together with carefully engineered water and oil passages, providing stronger resistance to blowouts and more consistent sealing under demanding conditions. The 1.8 mm thickness offers greater flexibility in compression ratio management compared with thinner gaskets, making it a practical choice for turbocharged RB25DET and NEO applications aimed at higher power outputs.
At Terra Firma Automotive, we supply this genuine Tomei 87.0-1.8 mm head gasket for Skyline and Stagea owners running the RB25 platform. Whether you are assembling a refreshed engine or preparing a more aggressive forced-induction setup, this gasket delivers the durability and precision expected from Tomei’s Japanese engineering. Choose Terra Firma Automotive for authentic components that support reliable high-performance RB25 builds.
- Genuine Tomei Cylinder Head Gasket
- Part Number: TA4070-NS06C
- Application: Nissan RB25DET / RB25DE (including NEO)
- Bore size: 87.0 mm
- Thickness: 1.8 mm
- Multi-layer metal construction
- Reinforced combustion chamber sealing
- Precision water and oil passage design
- Ideal for higher-boost applications
- Helps lower static compression ratio
- Improved resistance to heat and cylinder pressure
- Direct fit for RB25-powered Skyline and Stagea models
- Stronger alternative to factory head gaskets
- Trusted Japanese performance component
- Available from Terra Firma Automotive
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