Spark Plug 4265/4 Copper
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Spark Plug 4265/4 Copper
Experience superior performance and reliability with the Spark Plug 4265/4 Copper. Designed for optimal efficiency, this spark plug is engineered to meet the highest standards, making it an essential addition to your vehicle maintenance toolkit.
Key Features:
- Copper-Glass Seal: The innovative copper-glass seal effectively bonds the insulator, terminal post, and center electrode, ensuring full voltage delivery at the spark gap for optimal ignition performance.
- Gas-Tight Seal: Enjoy peace of mind with a 100% leak-proof design that prevents any gas leakage, enhancing the longevity and reliability of your spark plug.
- Multi-Rib Insulator: The multi-ribbed insulator significantly reduces the risk of “flash-over,” providing safer operation in various conditions.
- One-Piece Terminal Post: Built for durability, the one-piece terminal post adds extra strength to withstand the demands of engine performance.
- Resistor Technology: The integrated resistor minimizes radio frequency interference (RFI) and reduces electrode erosion, prolonging the life of the spark plug.
- Cold-Formed Steel Shell: Constructed with a precision rolled thread design, the cold-formed steel shell ensures a proper fit and enhances durability.
- Full Copper Core Electrode: The full copper core electrode delivers superior performance across all conditions, ensuring reliable starts and efficient combustion.
Benefits:
- Enhanced ignition efficiency for improved engine performance.
- Extended lifespan and reliability, reducing the frequency of replacements.
- Optimized for a variety of vehicle types, ensuring versatility.
Use Cases:
The Spark Plug 4265/4 Copper is ideal for automotive enthusiasts and mechanics who demand quality and performance. Whether you are tuning your engine, performing routine maintenance, or upgrading your vehicle, this spark plug is designed to meet your needs.
Note: Please verify all cross-reference listings before purchase to ensure compatibility with your vehicle.
Shipping & Returns
Shipping & Returns
Shipping:
Most qualifying in-stock orders are processed within one business day. In the contiguous 48 states, eligible in-stock orders placed before 12:00 PM (noon) in the customer's local time zone typically ship the same business day. Orders shipping to Alaska or Hawaii use a 12:00 PM Pacific Time cutoff (California time). These cutoffs apply only to eligible in-stock orders and are not guaranteed shipping or delivery times. Same-day shipping refers to processing and carrier handoff, not delivery. Weekends and holidays are excluded.
Payment verification, address verification, fraud review, and inventory availability may take longer. Supplier-direct fulfillment, freight shipping, and special handling may also take longer.
Returns:
Eligible products may be returned within 60 days of delivery, subject to our Return Policy. Return authorization is required. Certain products are final sale or subject to manufacturer warranty procedures, shipping charges, and applicable restocking fees.
Please inspect your order promptly upon delivery. Shipping damage, incorrect items, missing components, or quantity shortages must be reported within 3 business days after delivery. Retain the product, original packaging, shipping labels, and photographs while your claim is reviewed.

