COMP Cams 4778-100 Valve Spring Locator Set - 1.550" OD .570" ID .060" Thick (100-Pack)

The COMP Cams 4778-100 inner diameter (ID) spring locator set provides a hardened steel alloy solution for high-performance and racing engines that experience extreme spring pressures and high RPM operation. This set includes 100 precision-machined valve spring seats designed to protect both the cylinder head and shim while securely locating and holding the valve spring in place.

Key Specifications:

• Outer Diameter (OD): 1.550 inches
• Inner Diameter (ID): .570 inches
• Thickness: .060 inches
• Material: Hardened steel alloy construction
• Quantity: 100 pieces per set

Design Features:

• ID locator design with locating shoulder on the inside diameter
• Eliminates the need for extensive cylinder head machining required by traditional OD cup-style locators
• Superior strength and durability compared to older standard shims
• Prevents spring migration and maintains proper valve train geometry
• Ideal for racing and high-performance applications with elevated spring loads

This inner diameter spring locator design offers a significant advantage over traditional outside diameter cup-style locators, which require substantial machining of the cylinder head. The ID locator shoulder provides secure spring positioning while minimizing machine work, making it an efficient and cost-effective solution for engine builders and performance enthusiasts.