TOMEI Beryllium Copper Valve Seat Ring Set Compatible with Nissan SR20DE & SR20DET (Silvia S13/S14/S15, 180SX)

Elevate your SR20 cylinder head with the TOMEI Beryllium Copper (BeCu) Valve Seat Ring Set, a critical upgrade for high-output builds. Designed for SR20DE and SR20DET engines in the S13, S14, S15 Silvia and 180SX, this set tackles the heat that limits performance. Made from beryllium copper alloy, these seat rings provide exceptional thermal conductivity—surpassed only by pure silver—to rapidly pull combustion heat away from the valves and into the cylinder head. This superior heat dissipation raises the engine's knock limit, allowing for more aggressive tuning, higher boost, and sustained power under high-RPM, high-load conditions. The BeCu alloy combines this preeminent cooling with ideal mechanical strength, fatigue resistance, and wear resistance, preventing heat-induced cracking and ensuring durability for track and high-performance street applications.

• Superior Heat Dissipation: Made from beryllium copper alloy (BeCu), offering thermal conductivity far greater than aluminum and standard cast iron to prevent detonation and manage extreme combustion temperatures.
• Complete SR20 Series Fitment: A full valve seat ring set for SR20DE and SR20DET engines found in the S13, S14, S15 Silvia and 180SX chassis.
• Performance & Reliability Essential: Critical for high-horsepower, high-RPM applications. Superior cooling protects against heat-induced cracking of the cylinder head, a common failure point with stock seats under extreme conditions.
• Racing-Grade Material Science: Beryllium copper provides the perfect balance of exceptional heat transfer, mechanical strength, fatigue resistance, and wear resistance required for professional racing engines.
• Professional Installation Mandatory: Valve seat installation requires specialized machining tools and expertise. This component must be installed by a professional engine shop with experience in performance cylinder head preparation.