The GSC Power-Division Viton 5.5mm Valve Stem Seals for Honda B K H Series engines (GSC1040) are a high-performance auto part manufactured in the United States by GSC. The product comes with a warranty and is designed with exceptional quality standards to ensure optimal engine performance. With a unit quantity of 16 seals included in the package, this product is ideal for Honda enthusiasts looking to enhance the performance of their vehicles while maintaining top-notch engine components. Additionally, the California Prop 65 warning ensures that users are aware of any potential health risks associated with the product.