
SPARK PLUG DPR8EIX-9 IRIDIUM SPARK PLUG
Genuine NGK, Japan
The improved throttle response, superior anti-fouling and high-ignitability makes Iridium IX® ideal for the performance enthusiast. Iridium’s extremely high melting point is perfectly suited to today’s high-temperature engines, delivering outstanding acceleration, fuel efficiency and durability.
- Fine iridium tip ensures high durability and a consistently stable spark
- Trivalent metal plating for superior anti-corrosion and anti-seizing properties
- Outstanding acceleration, high fuel efficiency and durability
If you’re looking for a high-quality, long-lasting spark plug for your vehicle, the NGK DPR8EIX is a top choice among auto parts and genuine accessories. Known for exceptional durability, better performance, and fuel efficiency, this spark plug is crafted with Japanese engineering and offers the reliability that NGK has become famous for. Below is a comprehensive guide covering the technical specifications, applications, features, and benefits of the NGK DPR8EIX, optimized for performance and longevity.

The NGK DPR8EIX spark plug is part of NGK’s Iridium IX series, making it one of the top choices for high-performance engines. Manufactured in Japan and designed to withstand demanding driving conditions, this spark plug is built to offer enhanced fuel efficiency, smoother engine performance, and an extended lifespan. NGK’s advanced iridium technology ensures reliable ignition in all conditions, whether you’re driving a motorcycle, ATV, or car.
For automotive enthusiasts who value the technical details, here’s an in-depth look at the NGK DPR8EIX spark plug specifications:
- Type: Iridium IX
- Thread Size: 12mm
- Thread Length: 19mm
- Hex Size: 18mm
- Heat Range: 8 (suitable for high-performance engines and long drives)
- Electrode Material: Iridium center electrode with nickel ground electrode
- Resistor: Yes (for EMI/RFI noise reduction)
- Gap: Pre-set at 0.9mm (can be adjusted as needed)
- Country of Manufacture: Japan
- Part Number: DPR8EIX-9

The NGK DPR8EIX is highly versatile and suitable for various engine types, including motorcycles, cars, and ATVs. Here are the common applications where this spark plug truly excels:
- Motorcycles: Known for fitting high-performance motorcycles from brands like Yamaha, Suzuki, Honda, and Kawasaki. It’s ideal for riders looking to improve engine response, especially in high-heat conditions.
- ATVs and Off-Road Vehicles: Provides the durability and reliable performance necessary for rugged off-road terrain and high-intensity conditions.
- Cars: Used in select models of vehicles with engines that require high heat-range plugs, ideal for those needing consistent and powerful ignition.
- Small Engine Applications: Also suitable for various small engines like lawnmowers and other power equipment, ensuring a clean burn and reliable starts.
The NGK DPR8EIX spark plug stands out for several key features that make it a reliable and effective choice for engine optimization:
Iridium Center Electrode
The iridium alloy center electrode is highly resistant to wear and corrosion, giving it a longer lifespan compared to standard plugs. Iridium is both stronger and more durable, ideal for engines that run at high speeds and temperatures.
Fine-Wire Design for Precise Ignition
NGK’s fine-wire design reduces the amount of energy needed to ignite the air-fuel mixture, resulting in quicker starts, better fuel economy, and more efficient combustion.
Extended Insulator Nose
The extended insulator nose design of the NGK DPR8EIX helps prevent fouling, ensuring a more consistent spark and clean operation, especially in performance engines.
Anti-Corrosion Coating
Manufactured with NGK’s unique trivalent metal plating, this spark plug has a protective anti-corrosion coating that prolongs its lifespan and makes it resistant to weather and environmental factors.
High Heat Range
With a heat range of 8, the NGK DPR8EIX is optimized for engines that run hotter and require a higher heat threshold, ideal for heavy-duty vehicles and sports applications.

Benefits of Using NGK DPR8EIX Spark Plug
Using genuine NGK DPR8EIX spark plugs provides a range of benefits, from performance enhancements to cost savings, that are ideal for auto enthusiasts and professionals seeking reliability. Here’s why it’s a smart investment for your vehicle:Better Fuel Economy
Thanks to the iridium tip, which requires less voltage to ignite the fuel-air mixture, you get improved fuel efficiency. This means longer trips on a full tank and overall fuel savings.
Improved Acceleration and Engine Response
For motorcycles, ATVs, and cars alike, NGK DPR8EIX offers a noticeable boost in engine responsiveness, resulting in smoother acceleration and quicker throttle response, especially in demanding driving conditions.
Extended Service Life
This Japanese-made spark plug lasts up to 80,000 miles, which is twice as long as traditional copper plugs. The long lifespan means fewer replacements, translating to lower maintenance costs over time.
Cleaner Emissions
The NGK DPR8EIX enables complete combustion, which reduces the carbon deposits in the engine and produces fewer emissions. This eco-friendly aspect helps your engine run cleaner, which is ideal for environmentally conscious drivers.

Enhanced Durability in High-Performance Applications
The unique design and iridium material provide exceptional durability and resistance to high temperatures, making it a perfect fit for sports vehicles, off-road vehicles, and other high-performance engines.
When it comes to choosing the right spark plug for your vehicle, the NGK DPR8EIX stands out as a top choice for anyone who values quality, performance, and longevity. Here are some reasons to opt for this model:
> Optimized for High-Performance Engines: If you have a performance vehicle or use your engine in challenging conditions, this spark plug’s high heat range and robust design will meet your needs.
> Compatible with a Variety of Engines: Suitable for motorcycles, cars, and small engines, it’s a versatile choice that serves a wide range of automotive applications.
To maximize the performance of your NGK DPR8EIX spark plug, here are some quick installation tips:
> Gap Verification: Although pre-gapped, always verify the gap against your engine’s specifications before installation.
> Use Anti-Seize Compound Sparingly: Apply a small amount to avoid damaging the threads when removing in the future.
> Follow Manufacturer’s Torque Recommendations: Use the recommended torque setting to prevent overtightening, which could damage the spark plug or engine threads.
The NGK DPR8EIX spark plug offers an unbeatable combination of performance, longevity, and reliability. Whether you’re looking to improve fuel efficiency, enjoy smoother engine operation, or reduce maintenance costs, this spark plug provides everything you need. Made with precision engineering in Japan, it’s a high-quality genuine auto part that’s trusted by drivers and mechanics worldwide.

PART SPECIFICATIONS
Enclosed are the specification of NGK IRIDIUM IX Spark Plug, Made in Japan.
Part Number | DPR8EIX-9 |
Stock Number | 2202 |
Barcode | 087295122020 |
Manufacturer | NGK |
Reach | 19mm (3/4") |
Terminal Type | M4 Thread |
Diameter | 12mm |
Seal Type | Gasket Seat |
Electrode Material | Iridium |
Projection Type | Projected |
Pack Size | 1 Single Unit |
Resistor | Yes |
Tip Configuration | Single Electrode |
Material | Iridium |
Hex Spanner Size | 18mm (11/16") |