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Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
⚠️ California Proposition 65 Warning : Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
Autolite Racing Spark Plugs are used by many professional race car drivers. These spark plugs contain an Yttrium-Enhanced Alloy, which enables up to 8 percent reduction in side wire temperature for improved durability and less pre-ignition. Autolite racing plugs are available in colder heat ranges than most plug manufacturers to support modified engines and feature a cut background electrode for improved ignitibility and faster flame kernel growth. They are also nickel plated for a long-lasting, corrosion-resistant finish. Since its inception, the Autolite brand has provided the automotive aftermarket and Original Equipment manufacturers the highest quality ignition products. Autolite has been in operation for over 100 years and has produced more than 11 billion spark plugs and glow plugs. These plugs are specifically designed for each application to meet or exceed OE quality and performance. Autolite makes plugs for Japanese, European, and Korean cars as well as plugs for Lawn & Garden and Power Sports. As a leading supplier of spark plugs, the Autolite brand has the right ignition products for your application, regardless of make or model, import or domestic.
Yes, we offer free standard shipping on all orders within the United States.
When will I receive my item?
Domestic orders typically arrive within 3-5 business days. Delivery times are estimated and may vary depending on your location, weather conditions, or other unforeseen factors.
Can I change or return my item?
We hope you love your purchase, but if you need to make a change or return your item, we’ve got you covered! You can initiate a return or exchange within 30 days of receiving your order. Please ensure the product is in its original condition and packaging. For more information on our return policy, please visit our Returns & Exchanges page.
Frequently Asked Questions
Q: What is the size of the Autolite AR3923-4PK spark plug?A: The Autolite AR3923-4PK spark plug measures one inch in length, one inch in width, and three point thirty-nine inches in height.
Q: What is the material of the Autolite AR3923-4PK spark plug?A: The spark plug contains an Yttrium-enhanced alloy, which improves durability and reduces pre-ignition.
Q: How many spark plugs are included in the Autolite AR3923-4PK package?A: The package includes four spark plugs, making it a convenient choice for racing applications.
Q: How do I install the Autolite AR3923-4PK spark plugs?A: To install, remove the old spark plugs using a spark plug socket, then insert the new Autolite plugs and tighten them to the manufacturer's specifications.
Q: Are these spark plugs suitable for modified engines?A: Yes, these spark plugs are specifically designed with colder heat ranges to support performance modifications in modified engines.
Q: Is the Autolite AR3923-4PK spark plug vehicle-specific?A: Yes, the Autolite AR3923-4PK spark plug is designed as a vehicle-specific fit type for optimal performance.
Q: How do I care for the Autolite AR3923-4PK spark plugs?A: Keep the spark plugs clean and free from debris to ensure optimal performance. Regularly check for signs of wear or damage.
Q: What is the lifespan of the Autolite AR3923-4PK spark plugs?A: The lifespan can vary based on engine conditions, but they are designed for high performance and should last through multiple racing events.
Q: Can I use the Autolite AR3923-4PK in my lawn mower?A: No, these spark plugs are specifically designed for racing and modified engines, not for lawn and garden equipment.
Q: How do I troubleshoot if my engine misfires after installing the spark plugs?A: If your engine misfires, check the installation torque, ensure the plugs are the correct type for your vehicle, and inspect for any electrical issues.
Q: What should I do if the Autolite AR3923-4PK arrives damaged?A: Contact the seller immediately to report the damage and inquire about the return or replacement process.
Q: Is there a warranty for the Autolite AR3923-4PK spark plugs?A: Yes, Autolite typically offers a warranty on their products, but specifics may vary, so check with the retailer for details.
Q: How do the Autolite AR3923-4PK compare to standard spark plugs?A: These racing plugs are designed for higher performance, featuring colder heat ranges and improved ignitibility compared to standard plugs.
Q: Are these spark plugs safe for use in all vehicles?A: No, ensure compatibility with your vehicle's specifications, as they are designed for specific racing and modified engine applications.
Q: What is the ignition performance of the Autolite AR3923-4PK spark plugs?A: The plugs feature a cut back ground electrode for improved ignitibility and faster flame kernel growth, enhancing engine performance.