Reliable cylinder head sealing is essential when building or refreshing an RB20DET, especially under higher boost and thermal loads. The Tomei Cylinder Head Gasket (part number TA4070-NS07C) is a multi-layer performance gasket designed for the Nissan RB20DET with an 80.5 mm bore and 1.8 mm thickness, offering improved sealing strength compared with many standard replacement gaskets.
Tomei developed this gasket with a focus on the stress points that cause conventional designs to fail under elevated cylinder pressures. The multi-layer construction and reinforced sealing structure help maintain a consistent seal around the combustion chambers, water jackets, and oil passages even as boost and heat increase. The 1.8 mm thickness provides a specific compression height option for builders fine-tuning quench and overall engine geometry during a rebuild or performance upgrade.
This gasket is well suited to RB20DET engines in Skyline and related platforms that see spirited street use or moderate performance modifications. At Terra Firma Automotive, we supply this genuine Tomei Cylinder Head Gasket as a trusted sealing solution for RB20 builds. Whether you are performing a stock-type refresh or preparing the engine for higher output, a properly engineered head gasket is fundamental to long-term reliability. Choose Terra Firma Automotive for authentic Tomei engine components that support durable, high-quality RB-series builds.
- Genuine Tomei Cylinder Head Gasket
- Part Number: TA4070-NS07C
- Application: Nissan RB20DET
- Bore size: 80.5 mm
- Thickness: 1.8 mm
- Multi-layer performance construction
- Reinforced sealing design for higher cylinder pressures
- Improved resistance to boost and heat-related failure
- Helps maintain consistent combustion, water, and oil sealing
- Suitable for street and moderate performance builds
- Specific thickness option for compression tuning
- Trusted Japanese performance gasket engineering
- Ideal for engine rebuilds and upgrades
- Available from Terra Firma Automotive
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