NGK SILZNAR8E7H 90172 Iridium Platinum Spark Plug 4/8/12pk

NGK SILZNAR8E7H 90172 Iridium Platinum Spark Plug

Upgrade your engine's ignition system with the NGK SILZNAR8E7H (Part No. 90172) Iridium Platinum Spark Plug. Engineered with a precision iridium and platinum dual-material electrode, this spark plug delivers reliable ignition, enhanced combustion efficiency, and extended service life — keeping your engine running at its best.

Available in convenient packs of 4, 8, or 12 pieces, it's ideal for full engine sets on a variety of compatible vehicles including Fox, Taurus, Wing Bo, and other models that share this OEM specification.

Key Features

• Iridium & Platinum Electrode: Premium Iraurita and platinum construction for superior durability and consistent spark performance
• OEM-Grade Fitment: Part number SILZNAR8E7H / 90172 — always verify against your vehicle's OEM specifications before ordering
• Multi-Pack Options: Choose 4pcs, 8pcs, or 12pcs to suit your needs — great for bulk replacements or keeping spares on hand
• High Ignition Reliability: Fine-tipped iridium center electrode promotes a more complete combustion cycle
• Long Service Life: Platinum ground electrode resists wear and corrosion for extended intervals between replacements
• No High-Concern Chemicals: Free from hazardous substances of concern

Specifications

Important Fitment Notice

⚠️ Please verify this spark plug part number matches your vehicle's OEM specifications before purchasing. Different engine models require specific heat ranges, thread sizes, and electrode gaps. Returns and refunds cannot be approved for orders placed without confirming compatibility.

Note: Packaging may vary across production batches. The product image shown is for reference only; the actual spark plug received shall prevail.

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Learn more: FuelEconomy.gov on vehicle maintenance

Frequently Asked Questions

Q: What vehicles are compatible with the NGK SILZNAR8E7H 90172 spark plug?

A: The NGK SILZNAR8E7H (90172) is compatible with select Fox, Taurus, Wing Bo, and other vehicles that share this OEM part specification. Always cross-reference the part number with your vehicle's owner manual or OEM fitment guide to confirm compatibility before purchasing.

Q: What is the difference between an iridium platinum spark plug and a standard spark plug?

A: Iridium platinum spark plugs like the NGK SILZNAR8E7H feature a fine iridium center electrode and a platinum ground electrode. This combination provides a more consistent spark, improved combustion efficiency, and a significantly longer service life compared to standard copper spark plugs — making them a smart long-term investment for your engine.

Q: How many spark plugs do I need for a full engine set?

A: The number of spark plugs required depends on your engine's cylinder count. Most 4-cylinder engines need 4 plugs, 8-cylinder engines need 8, and some performance or diesel engines may require more. This product is available in 4-pack, 8-pack, and 12-pack options so you can order exactly what your engine requires.

Q: Can I return the spark plugs if they don't fit my vehicle?

A: Returns and refunds are not approved for orders placed without confirming fitment. Please verify the part number SILZNAR8E7H / 90172 matches your vehicle's OEM specification — including heat range, thread size, and electrode gap — prior to placing your order.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.