3923 Spark Plug 3923/4 Copper
3923 Spark Plug 3923/4 Copper
Available in stock (24)
3923 Spark Plug 3923/4 Copper
Experience exceptional performance and reliability with the 3923 Spark Plug 3923/4 Copper. Designed for high efficiency and durability, this spark plug is a crucial component for any engine. Here are the standout features that make it a must-have:
- Copper-Glass Seal: The unique copper-glass seal bonds the insulator and terminal post center electrode, ensuring full voltage is delivered at the spark gap for optimal combustion.
- Gas-Tight Seal: This spark plug offers a 100% leak-proof design, providing peace of mind and reliability during operation.
- Multi-Rib Insulator: The innovative multi-rib design reduces the risk of “flash-over,” enhancing the spark plug's overall performance.
- One-Piece Terminal Post: Built for strength and durability, the one-piece terminal post contributes to the spark plug's robustness.
- Resistor Feature: The built-in resistor minimizes radio frequency interference (RFI) and electrode erosion, ensuring longevity and high performance.
- Cold-Formed Steel Shell: The spark plug boasts a precision-rolled thread design, enhancing its fit and functionality.
- Full Copper Core Electrode: Provides superior performance in varying conditions, making it an ideal choice for diverse applications.
Before making a purchase, be sure to verify all cross-reference listings to ensure compatibility with your vehicle. Upgrade to the 3923 Spark Plug 3923/4 Copper and experience the difference in your engine's performance!
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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.

