Description:

Multi-ground electrodes specified by engine manufacturer for unusual combustion chamber design. Copper core for better thermal conductivity. Machine rolled threads to reduce cross-threading and seizing. The plug insulator is constructed of purified alumina powder for extreme stress with 5 ribs to prevent flashover. Model # 4170 Features: Denso # 4170 Dual Ground Electrodes NOTE: Plug has Threaded Terminal Stud and does not contain terminal nut. If terminal nut is needed, order part#067606-0051.