4194 Spark Plug 4194/4 Copper
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4194 Spark Plug 4194/4 Copper
Experience the power and reliability of the 4194 Spark Plug 4194/4 Copper, designed to meet the demanding needs of modern engines. This spark plug combines innovative technology with exceptional performance, making it an essential component for your vehicle's ignition system.
Key Features:
- Copper-Glass Seal: The advanced copper-glass seal effectively bonds the insulator, terminal post, and center electrode, ensuring a consistent supply of voltage at the spark gap for reliable ignition.
- Gas-Tight Seal: Enjoy peace of mind with a 100% leak-proof design that guarantees a gas-tight seal, enhancing the efficiency of your engine.
- Multi-Rib Insulator: The innovative multi-rib insulator significantly reduces the risk of “flash-over,” promoting safer and more efficient operation.
- One-Piece Terminal Post: Built for durability, the one-piece terminal post enhances structural strength, ensuring longevity and performance under pressure.
- Resistor Design: Equipped with a resistor that minimizes radio frequency interference (RFI) and reduces electrode erosion, this spark plug supports optimal engine performance.
- Precision Engineering: The cold-formed steel shell features precision rolled threads, guaranteeing a secure fit and ease of installation.
- Full Copper Core Electrode: Experience superior performance in all conditions with the full copper core electrode that enhances conductivity and reliability.
Before making a purchase, we recommend verifying all cross-reference listings to ensure compatibility with your vehicle. Upgrade your ignition system today with the 4194 Spark Plug 4194/4 Copper and enjoy improved engine performance!
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.

