NAPA Auto Parts Sterling, VA
45449 Severn Way
Sterling,  VA  20166-8918
(703) 378-6666
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Mon-Fri:8:00 AM-6:00 PM
Sat:8:00 AM-3:00 PM
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Autolite Iridium XP Spark Plug

Autolite Iridium XP Spark Plug

Part #: ASP XP3923
Line: Autolite

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Features & Benefits

Warranty: Standard : 7 Years


Autolite Is America's Best Selling Spark Plug

  • Autolite Iridium Xp Spark Plugs Provide Optimized Performance Upgrade For Most Vehicles
  • Ideal Replacement Plug For Vehicles Originally Equipped With Iridium Spark Plugs
  • Matches Fit, Form, And Function For Both Foreign And Domestic Vehicles
  • Offers A Proprietary Blend Of Elements That Resist Wear And Deliver Reliable Performance
  • Finewire Design Generates Larger Flame Kernel For Improved Ignitability**, Consistent Engine Performance, And Fuel Burn
  • (** Compared To 0.8mm Finewire, Multi-electrode Design And Standard Plugs
  • Compared To Average Of Other Premium Brands)
  • Fits 94.8% Application Coverage For Both Import And Domestic Vehicles
  • Guaranteed for 7 Years
  • Visit the Autolite Brand Page to learn more about our products.


Brand Autolite
Spark Plug Thread Size 14 mm
Electrode Core Material Iridium
Spark Plug Reach 3/4"
VMRS Code 033003005
Spark Plug Seat Type Gasket
Spark Plug Hex Size 5/8"
Quality Level Best

Safety Information

Vehicle Fitment Guide

Product Reviews