Manufactured to the strictest OE performance, durability and emissions standards.

• No-compromise, top of the line race spark plug for the most serious enthusiast.
• Patented U-groove ground electrode design fires leaner mixtures than conventional plugs
• Precision machine-rolled threads reduce seizing and cross-threading in delicate aluminum heads
• Wide range of part numbers for thousands of applications, including classic and collector cars
• Lasts twice as long as most conventional plugs
• Withstands temperatures greater than 4000° Fahrenheit
• Electrode Core Material : Copper
• Electrode Tip Material : 0.7mm Iridium
• Ground Strap Quantity : 1
• Insulator Type : Purified Alumina
• Manufacturer Heat Range : 20
• Material : 0.7mm Iridium
• Reach : 3/4 In
• Resistor : Yes
• Seat Type : Gasket
• Thread Diameter : 14 mm
• Tip Configuration : 0.7mm Iridium
• Type : Iridium Long Life
• Wrench Diameter : 5/8 In