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Autolite XP103 Racing Spark Plug, 5/8 Hex, Mid Projection
Autolite XP103 Racing Spark Plug, 5/8 Hex, Mid Projection

Autolite XP103 Racing Spark Plug, 5/8 Hex, Mid Projection

Tapered Spark Plug Seat Style, 0.708" Spark Plug Reach, 14mm x 1.25 Thread Pitch, Resistor

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Autolite XP103 Racing Spark Plug, 5/8 Hex, Mid Projection
Autolite XP103 Racing Spark Plug, 5/8 Hex, Mid Projection
Autolite XP103 Racing Spark Plug, 5/8 Hex, Mid Projection
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Autolite XP103 Racing Spark Plug, 5/8 Hex, Mid Projection
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Part # 373XP103
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  • Spark plugs utilize an iridium-enhanced 0.6 mm fine wire and proprietary platinum side wire
  • Engineered to provide improved durability and a more focused ignition
  • Offers a better overall ignitability providing optimum performance
  • Core is made from copper and has an iridium tip
  • Has a 14mm x 1.25 thread pitch with a tapered seat

Details

Spark Plug Seat Style:
Tapered
Spark Plug Reach:
0.708"
Thread Pitch:
14mm x 1.25
Insulator Type:
Projected
Resistor:
Yes
Core Material:
Copper
Tip Material:
Iridium
MFG. Part #:
XP103
Wrench Size:
5/8"
Sold in Quantity:
Each

Info

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: 0.708"
  • Hex Size: 5/8" (16mm)
  • Seat Type: Tapered
  • Tip Configuration: Mid Projection
  • Metal Type: Iridium
  • Terminal Type: Solid

Important Messages

  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
Some parts are not legal for use in California or other states with similar laws/regulations

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Videos & Articles
  • Follow along as our expert goes through his process for replacing the steel wire covers on his 1954 Dodge 241 with a set of Offenhauser Finned Wire Covers.
  • In preparation to transplant a 430hp 383 stroker into Project Chevelle, Zach R. made up a set of plug wires for the car. To keep it nice and tidy they needed to be routed just right, be the perfect length and not distract from the engine!
  • Learn how to install spark plug wire ends. Our step by step guide takes you through terminal end and boot installation with the use of a wire stripper tool.

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