Brisk Iridium Racing DOR15IR Spark PlugDOR15IR Iridium Racing Brisk Performance Spark Plugs Brisk SKU DOR15IR Parameters: Thread Diameter 14mm Thread Reach 19mm 3 4" Hexagon 16mm 5 8" Seat Type Gasket Design Iridium Center Electrode Resistor Yes Projected Special Semi Heat Range 15 Brisk DOR15IR Replaces: KEY BENEFITS AND APPLICATIONS Iridium is 6x 8x Stronger 1200 Degrees Higher Melting Point than Platinum Power Focus Spark Exactly in the Focal Point of the Reflector Lower Required

Brisk DR08ZS Replaces:

RR12YS Brisk Racing Silver Spark Plug

HOR14LGS Premium LGS Brisk Racing Spark Plugs

Brisk EOR14LGS Replaces:

Brisk AR12ZS Replaces:

Brisk DR14YS Replaces:

increases reliability and reduces side arcing even at very rich mixtures

DOR08LGS Premium LGS Brisk Racing Spark Plugs

BR10YS-9 Brisk Racing Silver Spark Plug

even very rich mixture found in race engine under heavy load

3VR10S Brisk Racing Silver Spark Plugs Ford 3V V8 Natural Aspirated Engines

In some instances an upgrade to the ignition coil should be made to maximize benefits of racing plugs