Ferrea 84-98 Harley-Davidson Evolution 0.819/1.103in OD 0.625/0.819in ID Dual Valve Springs-Set of 4

This is a set of four dual valve springs from Ferrea, specifically made for 1984-1998 Harley-Davidson Evolution engines. These springs are crucial for keeping your engine's valve train in sync, ensuring proper intake and exhaust valve operation under demanding conditions. They are designed to handle the stresses of performance cams and higher RPMs, helping to prevent valve float and maintain consistent valve control.

Ferrea is known for making well-built engine components, and these valve springs are no exception. They feature a dual spring design, which offers improved stability and dampening compared to single springs. The outer spring has an outside diameter of 0.819 inches and an inside diameter of 0.625 inches, while the inner spring measures 1.103 inches outside diameter and 0.819 inches inside diameter. This specific sizing is important for proper fitment and function within the Evolution engine's cylinder heads.

When rebuilding or upgrading the top end of your Harley-Davidson Evolution, choosing reliable valve springs is key to achieving optimal performance and longevity. This set of four springs is a solid option for those looking to ensure their valve train can keep up with their engine's demands.