Tomei Valve Seat Rings for 4B11 Mitsubishi Evo X (TA310A-MT02A)

Tomei valve seat rings for the EvoX are crafted to efficiently dissipate heat in the 4B11T engine, preventing cracks. Achieving high engine output under intense rotation and load is challenging without adequate cylinder cooling, resulting in high cylinder head temperatures and a lower knock limit. Racing engines employ high-conductivity metals like copper for valve seats to handle heat. Beryllium copper alloy (BeCu) is chosen for its strength, fatigue resistance, and durability, ensuring superior cylinder cooling performance.

Vehicle Fitment:
2008-2015 Mitsubishi Evolution X (4B11T)

Includes:
16 valve seat rings (8 intake & 8 exhaust)

More Info:
The valve seat's main role is to maintain a tight seal with the valve, crucial for wear resistance. In high-performance engines operating at high RPM and load, effective valve seat cooling is critical for optimal engine output. Elevated engine temperatures, especially near the cylinder head, can restrict performance and knock resistance. In racing engines, precise temperature control is essential. To improve cooling efficiency, high thermal conductivity metals like copper are used in valve seats. Copper, known for its exceptional thermal conductivity among metals, efficiently transfers heat from the cylinder to the cylinder head. Beryllium copper alloy (BeCu) is selected for its mechanical strength, fatigue resistance, and durability, ensuring superior cooling performance.