745142 10PCK Valve Spring Shim 760X 578X 030

These valve spring spacing shims from Kibblewhite Precision Machining are a staple for professional engine builders working on Harley-Davidson cylinder heads. It is critical to verify and correct the valve spring installed height following any valve work, and these precision-ground shims provide the necessary adjustment. Built to handle the thermal and mechanical demands of the valvetrain, they help maintain the integrity of the engine's timing and lift characteristics. Choosing KPMI components ensures that your engine assembly meets exacting tolerances for long-term durability.