High quality valve springs silicon chrome steel oil temper wire (JISSWOSC-V) has been treated with shot peening processing to improve metal fatigue strength. It is resistant to heat dripping even when used for long periods of time under high temperatures, and provides stable performance.
Simple paint for identification is just as good as your original product. They are not permanent color tolerances, so the color may come off when using. Please choose the product that is the best spring rate when you have understood the engine horsepower and peak power rotation