Cap-A-Dapt Adapter Base, Cap-A-Dapt Adapter Base; For Fixed/Adjustable Rotor Cap;, Distributor Cap Spacer, Designed w/Performance In Mind, High Quality Material, This is an adapter base for the cap-a-dapt PN 8445 and 8420. This is a black sleeve that sits at the base of the distributor cap assembly., DstCapSpacer, Distributor Cap Spacer