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Wiseco Stainless Steel Intake Valves carry a one-piece forged construction for toughness that you can rely on. These intake valves can handle fatigue and are coated with chromium nitride to enhance its durability and wear resistance. They are easy to install, and the valves work with OEM springs and valve train. Piston or head alteration is not required. Wiseco ensures that these stainless intake valves are the best valves for motorcycle and powersports applications.