AUTOLITE Resistor Spark Plug 009100254863

( Brand: Autolite ), ( Manufacturer Part Number: 4063S ), ( Type: Electrical ), ( Country Of Origin: China ), ( Item Length: 3.300 ), ( California Prop 65 Warning: Cancer And Reproductive Harm Www.p65warnings.ca.gov ), ( Manufacturer Warranty: 1 Year Manufacturer Warranty ), ( Authorized Dealer: Yes ), ( Compatibility Disclaimer: Compatibility Chart Information Provided By ), ( Height: 0.800 ), ( Legal Disclaimer: Your Local Laws Before Purchasing. ), ( Photo Disclaimer: For Reference Only, May Differ From Product, See Item Details. ), ( UPC: 009100254863 )

Review AUTOLITE 4063 Resistor Spark Plug

The **Autolite 4063S (4063) Resistor Spark Plug** is a high-performance, copper-core ignition component designed to deliver reliable, efficient spark generation for a wide range of gasoline-powered engines, including those found in late-model vehicles and performance applications. Engineered with precision, this spark plug features a **resistor wire** integrated into its construction, which helps suppress radio frequency interference (RFI) and electromagnetic interference (EMI), reducing potential electrical noise that could disrupt vehicle electronics, such as radios, GPS systems, or engine control modules. The **4063 designation** indicates a standard reach (19/32-inch thread size) and a 1-inch overall length, making it a versatile fit for numerous engine configurations, from compact sedans to muscle cars and even some light-duty trucks.

At the core of the Autolite 4063S is a **copper electrode**, a material known for its superior heat dissipation and conductivity, ensuring consistent spark formation even under demanding conditions. The **platinum-tipped electrode** enhances durability by resisting erosion and fouling, extending the plug s lifespan and maintaining optimal ignition performance over thousands of miles. The **resistor wire** is strategically placed to minimize interference while preserving the plug s ability to generate a strong, reliable spark critical for efficient combustion, smooth engine operation, and reduced fuel consumption. This design is particularly beneficial in modern vehicles equipped with advanced ignition systems and electronic controls, where electrical noise can otherwise disrupt sensitive onboard electronics.

The **heat range** of the Autolite 4063S is engineered to balance performance and longevity, making it suitable for moderate to high-performance engines that operate within typical temperature ranges. The **ground electrode** is precision-ground to ensure a consistent gap (typically 0.024 inches), which can be easily adjusted if needed, allowing for fine-tuning of ignition timing for optimal engine response. Whether installed in a daily driver, a high-mileage vehicle, or a modified performance engine, the Autolite 4063S delivers a dependable spark, helping to prevent misfires, improve throttle response, and contribute to overall engine efficiency.

Built to meet or exceed industry standards, the Autolite 4063S is a cost-effective alternative to premium aftermarket or OEM spark plugs, offering the same high-quality performance without the premium price tag. Its robust construction, combined with the reliability of the Autolite brand a trusted name in automotive ignition components makes it an excellent choice for mechanics, DIY enthusiasts, and drivers seeking a balance of performance, durability, and affordability. Whether replacing worn-out plugs or upgrading an engine for better efficiency, the Autolite 4063S ensures a strong, consistent spark every time, helping to keep engines running smoothly and powerfully for miles to come.

**Pros and Cons of Buying Autolite 4063S and 4063 Resistor Spark Plugs**

1. **Compatibility and Availability** Autolite is a well-known brand with a wide range of spark plugs designed for various vehicle makes and models. The 4063 and 4063S are commonly recommended for older vehicles, particularly those with resistor-type plugs, such as many GM, Ford, and Chrysler applications from the 1980s and 1990s.

2. **Budget-Friendly Option** These plugs are generally affordable compared to some high-performance or iridium/platinum alternatives, making them a cost-effective choice for basic maintenance or replacement.

3. **Proven Performance** Autolite has a long history of producing reliable spark plugs for standard gasoline engines. The resistor design helps reduce radio interference, which can be beneficial for older vehicles with less advanced ignition systems.

4. **Easy Installation** They are straightforward to install, requiring no special tools beyond a spark plug socket and ratchet. The design is simple and durable for everyday driving conditions.

5. **Widely Stocked** Due to their popularity, these plugs are easy to find at auto parts stores, online retailers, and even some gas stations, reducing lead time for replacement.

1. **Wear and Durability** The 4063 and 4063S are copper-core plugs, which wear out faster than more advanced materials like platinum or iridium. They typically need replacement every 20,000 to 30,000 miles, depending on driving conditions, whereas premium plugs can last much longer.

2. **Poorer Fuel Efficiency and Performance** Copper plugs can lead to slightly less efficient combustion compared to newer materials, which may result in marginally lower fuel economy and power output over time.

3. **Higher Radio Interference Risk** While the resistor helps reduce interference, copper plugs can still contribute to static or electrical noise in some vehicles, particularly older models with sensitive electronics.

4. **Less Suitable for High-Performance or Modern Engines** These plugs are not ideal for turbocharged, high-compression, or modern fuel-injected engines, which often require more durable and precise spark plugs for optimal performance.

5. **Potential for Misfires Over Time** As the electrodes wear unevenly, misfires can become more frequent, especially if the plugs are not replaced at the recommended interval. This can lead to rough idling, poor acceleration, or even engine damage if ignored.

The Autolite 4063 and 4063S resistor spark plugs are a practical and budget-friendly choice for older vehicles that require standard copper plugs. They offer good reliability for basic use and are widely available, making them a convenient option for routine maintenance. However, their shorter lifespan and lower performance compared to modern alternatives mean they are not the best long-term solution for high-mileage or performance-oriented applications. If your vehicle is older and runs well with these plugs, they can be a solid replacement. For newer or high-performance engines, upgrading to platinum or iridium plugs would be more beneficial in the long run.

If you are replacing plugs in an older vehicle (pre-2000s) that has been running smoothly with resistor-type plugs, the Autolite 4063 or 4063S is a reasonable and cost-effective choice. However, if your vehicle is newer, high-mileage, or used for performance driving, consider upgrading to a higher-quality plug (such as NGK or Denso platinum or iridium plugs) for better longevity and efficiency. Always follow your vehicle s maintenance schedule and consult your owner s manual or a trusted mechanic to ensure the correct plug type and interval for your specific engine.

Details:

Combines quality and performance. Spark Plug Code: 4063, Thread 14mm Reach 3/4in. Season-long plug. Engineered to meet or exceed Factory specifications.

part #: 4063s prices

• $6.66-$19.99

specifications cyclesparkplugs:

• brand: Autolite
• mpn: 4063s
• type: Electrical
• country of origin: China
• item length: 3.300
• california prop 65 warning: Cancer And Reproductive Harm Www.p65warnings.ca.gov
• manufacturer warranty: 1 Year Manufacturer Warranty
• authorized dealer: Yes
• compatibility disclaimer: Compatibility Chart Information Provided By
• height: 0.800
• legal disclaimer: Your Local Laws Before Purchasing.
• photo disclaimer: For Reference Only, May Differ From Product, See Item Details.
• upc: 009100254863

shipping cyclesparkplugs:

• class: Expedited, Standard
• transit: 2-7 Days
• type: Fixed
• service: Expedited, Standard
• cost: $0.00

general cyclesparkplugs:

• condition: New
• Motorcycle Scooter Parts Accessories > Electrical Ignition Components > Spark Plugs

payments cyclesparkplugs:

• credit card: Visa
• wallet: Paypal
• other

seller cyclesparkplugs:

• # reviews: 179999
• rating: 98.4%
• city: Cedar Park, Texas

returns cyclesparkplugs:

• policy: Returns Accepted
• time: 30 Days
• paid by: Seller

offer cyclesparkplugs:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• quantity: 9
• started: February 10, 2026

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