Kit includes 4 inner and 4 outer springsFor valve lifts up to .560"Installation does not require any machiningThe combination of high lift springs and collars make installing big cams a lot easierAndrews steel spring collars are part number 434-240Kit includes 4 inner and 4 outer springs For valve lifts up to .560" Installation does not require any machining The combination of high lift springs and collars make installing big cams a lot easier Andrews steel spring collars are part number 434-240