Upgrade your engine's valve train with the Supertech BMW S42 / Honda B16A / Acura B18C5 Steel Spring Retainer set. Designed for high-performance applications, these retainers are crafted from durable steel to ensure reliable operation under demanding conditions. This set includes 16 retainers, making it suitable for complete valve spring replacements or upgrades, providing a cost-effective solution for enthusiasts and professional rebuilds alike. The precision manufacturing process guarantees a perfect fit, reducing the risk of valve float or spring failure during high RPM operation. Whether you're building a race engine or restoring your vehicle to factory standards, these steel retainers are engineered for longevity and consistent performance. The robust construction and compatibility with multiple Honda and Acura engine models make these retainers a versatile choice for your next rebuild or upgrade project. Trust Supertech's quality and durability for your engine components to ensure your vehicle runs smoothly and efficiently. The set is lightweight and designed to meet or exceed OEM standards, providing peace of mind during installation and operation.