NGK Spark Plug Iridium Sim Ac 087295171646 41-932

( Brand: Ngk ), ( Manufacturer Part Number: 7164 ), ( Part Type: Spark Ac Plug ), ( UPC: 087295171646 )

Review NGK Spark Plug Iridium #7164 Sim Ac

The **NGK 7164 Iridium IX Spark Plug** is a high-performance, precision-engineered ignition component designed to deliver exceptional reliability, efficiency, and longevity across a wide range of modern gasoline-powered engines. Part of NGK s advanced **Iridium IX** lineup, this spark plug features a **single iridium electrode** just 0.4 mm in diameter paired with a robust **copper core** and a **silver-plated copper conductor**, ensuring optimal heat dissipation and consistent spark generation even under demanding conditions. The **fine-grain nickel alloy body** provides superior corrosion resistance, while the **resistor-coated center electrode** minimizes radio interference, making it ideal for vehicles equipped with modern electronic systems. Engineered with a **0.7 mm electrode gap**, the 7164 offers precise ignition timing, promoting cleaner combustion, reduced fuel consumption, and enhanced engine responsiveness. Its **heat range of 41** strikes a balance between performance and durability, making it suitable for high-compression engines, turbocharged applications, and vehicles with high-performance modifications. The **threaded design with a 14mm x 1.25mm fine thread** ensures a secure, leak-proof fit, while the **conical seat** and **anti-seize coating** prevent seizing and simplify installation. Whether used in stock applications or aftermarket builds, the NGK 7164 Iridium IX spark plug exemplifies NGK s commitment to innovation, delivering a blend of performance, reliability, and extended service life making it a trusted choice for discerning mechanics and enthusiasts alike.

### **Pros and Cons of buying a NGK 7164 Iridium SP-G Spark Plug (IRIDIUM SIM AC 41-932)**

1. **Long Lifespan** Iridium-tipped spark plugs, like the NGK 7164, typically last significantly longer than standard copper or platinum plugs, often requiring replacement every 60,000 to 100,000 miles instead of 30,000. This reduces maintenance frequency and labor costs over time.

2. **Superior Ignition Performance** The fine iridium electrode provides a hotter, more consistent spark, improving combustion efficiency. This can lead to better engine performance, smoother idling, and reduced misfires, especially in high-performance or turbocharged engines.

3. **Fuel Efficiency** More efficient combustion from the iridium tip can slightly improve fuel economy, though the difference may be marginal in most everyday driving conditions.

4. **Durability and Resistance to Wear** Iridium is harder and more resistant to erosion than platinum or copper, meaning the plug maintains its shape and performance longer under high-stress conditions (e.g., high RPM, turbocharging, or forced induction).

5. **Compatibility with Modern Engines** The NGK 7164 is designed for use in gasoline engines with a compression ratio of 9.5:1 or higher, making it suitable for many modern vehicles, including those with direct injection or turbocharged setups.

6. **Reliability from a Trusted Brand** NGK is a well-established manufacturer with a strong reputation for quality and consistency. Their plugs are widely used in OEM applications and aftermarket tuning.

7. **Easier Installation** The plug has a standard thread design and is compatible with most standard spark plug sockets, making installation straightforward for DIYers.

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1. **Higher Upfront Cost** Iridium plugs are significantly more expensive than standard copper or platinum plugs. While they save money in the long run, the initial purchase price can be a deterrent for budget-conscious buyers.

2. **Potential for Over-Tightening** Due to their durability, some drivers may be tempted to overtighten the plug, risking damage to the threads or the engine s cylinder head. NGK recommends a torque specification (typically 13 17 Nm or 10 13 ft-lbs), which must be followed carefully.

3. **Limited Availability in Some Regions** While NGK is widely available, certain specialty or older vehicles might require less common part numbers, potentially leading to longer wait times or higher shipping costs.

4. **Not Ideal for High-Mileage or Severely Worn Engines** If an engine has significant carbon buildup, oil fouling, or other issues, an iridium plug may not perform optimally until the underlying problems are addressed. In such cases, a standard plug might be more forgiving.

5. **Slightly Higher Heat Range Sensitivity** Iridium plugs are often designed for specific heat ranges. If the wrong heat range is selected (e.g., too cold for a high-performance engine or too hot for a naturally aspirated engine), it could lead to pre-ignition (knocking) or fouling.

6. **Less Forgiving Than Platinum Plugs** While still durable, iridium plugs are more precise and less tolerant of improper installation or contamination (e.g., oil or fuel fouling) compared to platinum or copper plugs.

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The NGK 7164 Iridium SP-G spark plug is an excellent choice for drivers seeking long-term reliability, improved performance, and fuel efficiency in modern gasoline engines. Its superior durability and ignition quality justify the higher cost for those who prioritize low maintenance and optimal engine function. However, the upfront expense and the need for careful installation may not be worth it for casual drivers or those on a tight budget. Additionally, it s best suited for well-maintained engines rather than those with pre-existing issues.

- You own a modern vehicle with a turbocharged, direct-injected, or high-performance engine.

- You want to extend the interval between spark plug replacements.

- You notice misfires, rough idling, or reduced performance and suspect worn plugs.

- You are willing to invest in long-term reliability and efficiency.

- You are on a tight budget and cannot afford the higher upfront cost.

- Your engine has significant carbon buildup, oil leaks, or other issues that would benefit from addressing before replacing plugs.

- You prefer a more forgiving plug (e.g., platinum) for older or high-mileage vehicles.

- You are unsure about proper installation techniques (consult a professional if needed).

For most modern vehicles, the NGK 7164 is a strong, high-quality option that delivers on performance and longevity. Always verify compatibility with your vehicle s specifications and follow installation guidelines to maximize its benefits.

Details:

NGK 7164 Spark Plug Iridium #7164 Sim Ac 41-932.

part #: 7164 prices

• $50.94-$113.77

specifications ignitionstartin:

• brand: Ngk
• mpn: 7164
• part type: Spark Ac Plug
• upc: 087295171646

general ignitionstartin:

• condition: New
• Boat Parts > Inboard Engines Components > Ignition Starting Systems

payments ignitionstartin:

• wallet: Apple-pay
• credit card: Visa
• other

seller ignitionstartin:

• city: Freeport, New York
• # reviews: 3635
• rating: 99.2%

shipping ignitionstartin:

• class: Standard, Economy
• cost: $8.30
• service: USPS Ground Advantage, FedEx Ground Economy
• type: Calculated
• transit: 4-9 Days
• carrier: USPS, FedEx

offer ignitionstartin:

• options: Ship-to-home
• sold: 0
• started: February 21, 2026
• quantity: 8
• availability: In Stock

returns ignitionstartin:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

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