AP646 Autolite Spark Plugs Spark Plug OE Replacement
AP646 Autolite Spark Plugs Spark Plug OE Replacement
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AP646 Autolite Spark Plugs Spark Plug OE Replacement
Introducing the AP646 Autolite Spark Plugs, the epitome of ignition excellence and reliability. With over a century of innovation and more than 11 billion spark plugs and glow plugs produced, Autolite stands as a trusted name in the automotive aftermarket and among Original Equipment manufacturers.
Key Features:
- Center Wire Platinum Firing Tip: Ensures reduced gap erosion, fewer misfires, and superior performance.
- High Nickel Alloy Side Electrode: Maintains a precise gap, delivering enhanced durability and longevity.
- Necked-Down Center Electrode: Fires quicker and cleaner, requiring less voltage for easier starts and quicker acceleration.
- Improved Fuel Economy: Optimized design promotes better fuel efficiency for your vehicle.
- OE Approved: Meets or exceeds original equipment standards for quality and performance.
- Proprietary Platinum Ball Welding Process: Provides a consistent point of contact for better adhesion and reliability.
Specifications:
- Reach: 3/4 Inch
- Electrode Core Material: Copper
- Electrode Tip Material: Platinum
- Insulator Type: Projected
- Thread Size: 14 Millimeter
- Seat Type: Gasket
- Wrench Diameter: 13/16 Inch Hex
Whether you're maintaining a Japanese, European, or Korean vehicle, or even a lawn and garden tool, Autolite has the right spark plug solution. Enjoy the confidence of an exclusive 4-year limited warranty, ensuring peace of mind and lasting performance.
Choose Autolite for ignition products that deliver exceptional quality, performance, and value for every application.
Shipping & Returns
Shipping & Returns
📦 Shipping:
Orders are processed within 1–2 business days. Standard delivery takes 3–7 business days, depending on your location.
↩️ Returns:
You may return or exchange products within 60 days of receiving your order. Items must be in original condition with proof of purchase. If your item is defective or damaged due to manufacturing issues, we’ll replace it at no additional cost.

