Tomei Berylium Valve Seat Ring Set RB26DETT TA310A-NS05A

Valve seat temperature control becomes critical as an RB26DETT is pushed to higher loads and RPM. The Tomei Beryllium Valve Seat Ring Set (part number TA310A-NS05A) is a complete intake and exhaust set manufactured from beryllium copper alloy and developed specifically for the Nissan RB26DETT in the Skyline R32, R33, and R34 GT-R.

Beryllium copper offers significantly higher thermal conductivity than conventional cast-iron seats, allowing heat to transfer more effectively from the valve contact area into the cylinder head. This improved cooling helps protect against localized overheating, reduces the risk of seat cracking or recession under extreme conditions, and supports more consistent combustion chamber temperatures in high-output engines. The material also provides good wear and fatigue resistance, making it well suited to performance and competition applications where thermal management is a priority.

These seats are an advanced upgrade typically installed during a full cylinder head rebuild and require proper machining for correct fitment. At Terra Firma Automotive, we supply this genuine Tomei Beryllium Copper Valve Seat Ring Set as a specialized component for serious RB26 builds. Whether the engine is being prepared for sustained high boost or high-RPM use, these seats deliver the heat-dissipation advantages associated with Tomei’s performance parts. Choose Terra Firma Automotive for authentic Japanese valvetrain components that support durable, high-output RB26DETT cylinder heads.

 

• Genuine Tomei Beryllium Valve Seat Ring Set
• Part Number: TA310A-NS05A
  
• Complete intake and exhaust set
• Material: Beryllium copper alloy (BeCu)
• Superior thermal conductivity versus stock seats
• Improved heat transfer into the cylinder head
• Helps reduce risk of seat cracking and overheating
• Good wear and fatigue resistance
• Designed for high-load and high-RPM applications
• Requires professional machining for installation
• Ideal for performance and competition cylinder heads
• Trusted Japanese valvetrain engineering
• Available from Terra Firma Automotive