I prefer to run non-resistor boots and resistor plugs. The reason being that the screw on terminal plugs always seemed to loosen up on me. The solid top plugs are only available as a resistor plug. For the boots I just use crimp on terminals with rubber boots. I have run the screw on NGK boots before and they worked ok. I would try the NGK PN 8381 boots if that`s what you are looking for. I just switched to crimp on boots as they are cheaper, I already have the crimper for making car plug wires, and I do feel they are more secure.