Compare Bosch EVO Spark Plug - 8502 Part #: 8502 Line: BOS Bosch EVO Spark Plug 7 Year Limited Warranty Seat: Gasket Thread Size: M12 Heat Range: 6 Hex Size (mm): 14mm Preset Gap (mm): 0.7mm Center Electrode Core Material: Copper Center Electrode Tip Material: Iridium Approximate Resistor Value (Ohm): 1000 Ohm Ground Electrode Tip Material: Platinum Thread Reach (mm): 12mm Metallurgy: Iridium/Platinum Show More Show Less
Compare Bosch EVO Spark Plug - 8505 Part #: 8505 Line: BOS Bosch EVO Spark Plug 7 Year Limited Warranty Seat: Gasket Thread Size: M12 Heat Range: 6 Hex Size (mm): 14mm Preset Gap (mm): 0.7mm Resistor Plug: Yes Center Electrode Core Material: Copper Center Electrode Tip Material: Iridium Approximate Resistor Value (Ohm): 6000 Ohm Ground Electrode Tip Material: Platinum Thread Reach (mm): 26mm Metallurgy: Iridium/Platinum Show More Show Less
Compare Bosch EVO Spark Plug - 8508 Part #: 8508 Line: BOS Bosch EVO Spark Plug 7 Year Limited Warranty Seat: Tapered Thread Size: M12 Heat Range: 5 Hex Size (mm): 14mm Preset Gap (mm): 0.7mm Resistor Plug: Yes Center Electrode Core Material: Copper Center Electrode Tip Material: Iridium Approximate Resistor Value (Ohm): 6000 Ohm Ground Electrode Tip Material: Platinum Thread Reach (mm): 25mm Metallurgy: Iridium/Platinum Show More Show Less
Compare Bosch EVO Spark Plug - 8515 Part #: 8515 Line: BOS Bosch EVO Spark Plug 7 Year Limited Warranty Seat: Gasket Thread Size: M12 Heat Range: 5 Hex Size (mm): 16mm Preset Gap (mm): 0.7mm Resistor Plug: Yes Center Electrode Core Material: Copper Center Electrode Tip Material: Iridium Approximate Resistor Value (Ohm): 6000 Ohm Ground Electrode Tip Material: Platinum Thread Reach (mm): 27mm Metallurgy: Iridium/Platinum Show More Show Less