Xtreme Start Spark Plugs
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Autolite Xtreme Start Spark Plugs

Part No. XST458DP Warranty Details  
Quantity  Add to Cart

Fit of this part varies by vehicle & equipment specs Type of Fit

From lawn mowers to chain saws, this plug provides quicker consistent starts versus the standard plug and an anti-foul design.

Product Features:
  • 0.6mm finewire design offers exceptional fouling resistance for reliable starting in any season or weather condition
  • Up to 26% quicker engine starts than the OE plug
  • Up to 21% less HC emissions than the OE plug
  • Meets or exceeds OE specifications
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Center Electrode Core Material:Copper Core
Electrode Tip Material:Finewire
Gasket Installed or Loose:Loose
Gasket Or Seal Included:Yes
Ground Electrode Core Material:Nickel alloy
Ground Electrode Quantity:1
Hex Size:5/8"
Insulator Type:Standard
Manufacturer Heat Range:5
Reach:0.375 in
Resistor Type:No
Rib Configuration:Standard
Seat Type:Gasket
Shell Material:Steel Alloy
Side Electrode:Yes
Terminal Top Fixed or Threaded:Fixed
Thread Diameter:14 mm
Tip Configuration:Ir Finewire


by PowerReviews
AutoliteXtreme Start Spark Plugs

(based on 2 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 2 customers

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Love Autolite


from undisclosed

Verified Buyer

Comments about Autolite Xtreme Start Spark Plugs:

Works well

(8 of 13 customers found this review helpful)


gr8 small engine sparkplug


from beaver falls, pa

Verified Buyer
Helpful Reviewer


  • Best small engine plug
  • Improves Performance


    Best Uses

      Comments about Autolite Xtreme Start Spark Plugs:

      best sparkplugs made / champion should go out of business.

      Displaying reviews 1-2

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