Kibblewhite #20-20425 - Valve Spring Kit - 0.415 Lift - Knucklehead '36-'47

Kit Includes:

• 4x CrSi Valve Springs

• 4x H.T. Steel Retainers

• 4x H.T. Steel Basewashers

• 4x H.T. Steel Keepers (Pair)

Features

• Designed to give stock pressures and work with stock cam profiles
• Retainers, keepers, and bases are modeled using FEA (Finite Element Analysis) to maximize mechanical strength
• Springs are wound from Super Clean chrome silicon valve spring wire that has been heat treated and shot peened
• Manufactured to original O.E.M. specifications using premium modern materials, design protocols and manufacturing techniques
• Made in the USA

Specs