P/N 08-00737 is a NGK Resistor Cap (LB05F) used on threaded type spark plugs.P/N 08-04960 is a NGK Resistor Cap (LB05E) used on solid top plugs.P/N 08-04960 is a NGK Resistor Cap (LB05E) used on solid top plugs.P/N 08-04960 is a NGK Resistor Cap (LB05E) used on solid top plugs.P/N 08-04960 is a NGK Resistor Cap (LB05E) used on solid top plugs.