Spark Plug Autolite AR3910X

Racing Spark Plug


Part Number AR3910X
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Spark Plug; Racing; Without Resistor; Yttrium-Enhanced Alloy; Standard Length; 0.938 Inch Reach; 0.030 Inch Gap; 5/8 Inch Hex; 14 Millimeter Thread; Flat Seat

Since its inception, the Autolite ® brand has provided the automotive aftermarket & Original Equipment manufacturers the highest quality ignition products. We have been in operation for over 100 years & have produced more than 11 Billion spark plugs & glow plugs. Our plugs are specifically designed for each application to meet or exceed OE quality & performance. Autolite makes plugs for Japanese, European & Korean cars as well as plugs for Lawn & Garden & Power Sports. As a leading supplier of spark plugs, ignition wire sets & Coil-on-Plug boots, the Autolite brand has the right ignition products for your vehicle, regardless of make or model, import or domestic.

Resistor: No

Electrode Type: OEM

Electrode Core Material: Yttrium-Enhanced Alloy

Insulator Type: Non-Projected

Thread Size (IN): 0.551 Inch

Thread Size (MM): 14 Millimeter

Reach: 0.748 Inch

Seat Type: Gasket

Wrench Diameter: 5/8 Inch

– Cut Back Ground Electrode For Improved Ignitability
– Anti-Corrosive Nickel Plating
– Large Ground Electrode For Better Heat Transfer
– Used By Many Professional Car Drivers
– Limited 90 Day Warranty


Weight 0.11000 kg
Dimensions 1.15000 × 3.50000 × 1.05000 cm

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