The Manley 42370 15 Valve O.D. Spring Cups are meticulously designed for optimal precision and durability, especially when used with the 221443 Valve Springs. These high-quality spring cups feature a 15 Valve Outer Diameter (O.D.), ensuring a snug yet easy fit for the valve springs. Their double-wall construction provides superior strength and resistance to wear, ensuring years of reliable service. The smooth interior surface reduces friction for reduced heat generation, extending the lifespan of the valve system. Made from high-grade, heat-treated material, these spring cups guarantee precision and accuracy in valve applications. With their superior build quality and functionality, the Manley 42370 15 Valve O.D. Spring Cups are a vital tool for any professional mechanic or DIY enthusiast looking to maintain their engine's performance and longevity.
