3521 NGK Spark Plugs Spark Plug OE Replacement
3521 NGK Spark Plugs Spark Plug OE Replacement
Available in stock (72)
3521 NGK Spark Plugs Spark Plug OE Replacement
Designed with the performance enthusiast in mind, the 3521 NGK Spark Plugs set the standard for quality and innovation in spark plug technology. When seeking the best for your vehicle, trust the world leader in spark plug manufacturing—NGK Spark Plugs.
Key Features:
- Fine Iridium Tip: Ensures high durability and a consistently stable spark for optimal engine performance.
- Iridium Alloy Composition: Boasts an extremely high melting point, making it perfect for today’s high-tech, high-performance engines.
- Trivalent Metal Plating: Provides superior anti-corrosion and anti-seizing properties, ensuring longevity and reliability.
- Outstanding Acceleration: Experience improved throttle response and high fuel efficiency with every drive.
- Superior Anti-Fouling: Designed to reduce fouling, giving you peace of mind and a smoother ride.
Specifications:
- Reach: 3/4 Inch
- Resistor: Yes
- Electrode Type: Taper Cut
- Electrode Core Material: Iridium
- Electrode Tip Material: Nickel
- Insulator Type: Non-Projected
- Thread Size: 10 Millimeter
- Seat Type: Flat
- Wrench Diameter: 5/8 Inch
- Quantity: Single
With a limited 60-day warranty, you can purchase with confidence, knowing that NGK Spark Plugs are engineered for excellence and designed to meet the needs of your high-performance engine.
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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.

