More Information for AUTOLITE XP64
{Alternate Inventory Numbers: XP64DP2}
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AUTOLITE XP64 Specifications
Center Electrode Core MaterialCopper
Center Electrode DesignFine Wire
Center Electrode Tip MaterialIridium
Electrical Terminal TypeStud
Gap Size0.044"
Gap Size1.1mm
Ground Electrode Core MaterialNickel
Ground Electrode Quantity1
Ground Electrode Tip DesignTapered
Ground Electrode Tip MaterialPlatinum
Hex Size21MM
Hex Size13/16"
Insulator MaterialCeramic
Resistance4000 82
Resistor TypeYes
Seat TypeFlat
Thread Diameter14mm
Tip ConfigurationMid Projection
Iridium XP; Pre-Set Gap: 0.044"
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.

Features & Benefits:
  • Better durability* and a more focused ignition for optimum performance.
  • Iridium enhanced 0.6mm finewire design for optimal durability and performance
  • Platinum protected ground wire for maximum efficiency in all ignition types including DIS systems
  • V-trimmed ground electrode for improved ignitability
*Compared to 0.8mm finewire, multi-electrode design and standard plugs.
**Compared to average of other premium brands.

This spark plug is pre-gapped, but may require minor adjustments with a Spark Plug Gap Tool / Feeler Gauge to match your engine's specifications. For proper engine performance, gaps should be within 0.004" of OE-Recommended value.
Which AUTOLITE Spark Plug Is Right For You?

Material / Series Lifespan / Durability Performance / Ignitability Efficiency / Fuel Economy
Copper / Nickel
★★★ ★★
Double Platinum
Double Platinum
★★★★ ★★
Iridium XP
Iridium XP
★★★★★ ★★★★★ ★★
Iridium Ultra
Iridium Ultra
★★★★★★ ★★★★★ ★★

Attention California Customers - Prop 65 not required to address for Autolite spark plugs

Closeout Inventory Warranty Information:
Wholesaler Closeout items have a 30 day warranty (but still are covered by our Return Policy).

AUTOLITE Regular Inventory Warranty Information:
2 years for Copper Spark Plugs; 4 years for Platinum Spark Plugs; 5 years for Double Platinum Spark Plugs; Limited Lifetime years for Iridium XP Spark Plugs; 5 years for Professional Series Wire Sets; 1 year for Glow Plugs
Warranty Details