Titanium Alloy Retainer

When engines are modified for higher output, this often involves high-lift camshafts and oversized valves to increase fuel mixture flow. To match these upgrades, reinforced valve springs are necessary. However, the high speeds and dynamic mass of the valve train can lead to abnormal movements like valve jumps and bounces, potentially causing severe engine damage. The Tomei retainers address this by reducing mass through the use of titanium alloy, while also providing the necessary strength and precision to securely hold the valves and springs. This control over valve movement helps prevent damage and improves engine response. Constructed from lightweight yet strong titanium alloy, these retainers weigh only 8.5g compared to the stock 12.9g. This significant weight reduction contributes to smoother valve train operation and improved dynamic balancing. The precision design and manufacturing ensure that the valve and valve spring are held securely in place, enabling consistent and stable valve opening and closing even under demanding conditions. Furthermore, the unique surface treatment applied to these retainers is a new technology that alters the material's surface itself, rather than just applying a coating. This process dramatically enhances hardness, durability, scratch resistance, wear resistance, heat resistance, and corrosion resistance. This product is specifically designed for Subaru EJ205, EJ207, EJ255, and EJ257 engines. It is intended for use with Tomei-specific valve springs and is a crucial part for enthusiasts seeking to maximize engine performance and reliability in tuned applications.