KPMI, valve spring kit. .415″ lift. Steel top collars

Great for OEM rebuilds with stock specifications. This is a stock replacement valve spring kit and okay up to .415″ valve lift and have a moderate 129 lbs seat pressure. The springs are manufactured from the highest quality clean chrome silicone wire; shot peened and heat treated for maximum fatigue life. Kit includes springs; upper collars; lower collars; and valve keys. Max valve lift: .415″. Installed height: 1.375″. Seat pressure 129 lbs. Open pressure: 272 lbs. @ .415″ valve lift.