Autolite XP5245 Iridium Spark Plugs - GM Vehicles

When you're passionate about performance, you need a technologically advanced plug. Autolite Iridium XP utilizes an iridium-enhanced 0.6 mm finewire and proprietary platinum sidewire for improved durability and a more focused ignition for better overall ignitability providing optimum performance.

Now with a lifetime limited warranty!

• Thread Size 14mm X 1.25
• Reach: 0.679"
• Hex Size: 5/8" (16mm)
• Seat Type: Tapered
• Metal Type: Iridium
• Terminal Type: Solid

Spark Plug Application Chart

Heat Range Chart (PDF)

Racing Plug Tech Note (PDF)

Understanding Heat Range (PDF)

Autolite Cross Reference Chart (PDF)