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NGK Iridium IX BPR8EIX Spark Plug | Heat Range 8

NGK Iridium IX BPR8EIX Spark Plug | Heat Range 8

6684

$ 8.00
Quantity
Quantity: Single Spark Plug
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NGK Iridium IX Spark Plug | BPR8EIX 6684

Improve ignition reliability and spark performance with the NGK Iridium IX BPR8EIX Spark Plug. Designed for performance enthusiasts, this heat range 8 spark plug features a fine-wire iridium center electrode for consistent ignition, excellent durability, and reliable operation in compatible high-performance engines.

The Iridium IX design uses a 0.6mm iridium center electrode to concentrate spark energy and improve ignitability. Combined with a tapered-cut ground electrode, this design helps promote consistent combustion, smooth idling, and responsive throttle performance.

NGK's trivalent metal shell plating provides corrosion resistance, while the copper-core electrode helps transfer heat away from the firing tip. These features make the BPR8EIX a popular choice for performance applications requiring its specific heat range, dimensions, and ignition characteristics.

Key Features

  • NGK Iridium IX performance spark plug
  • Fine-wire 0.6mm iridium center electrode
  • NGK heat range 8
  • Tapered-cut ground electrode for improved ignitability
  • Copper-core construction for effective heat transfer
  • Trivalent metal plating for corrosion resistance
  • Designed for consistent spark performance and durability
  • Resistor design helps reduce electrical interference
  • NGK stock number 6684
  • NGK part number BPR8EIX

Technical Specifications

  • Manufacturer: NGK
  • Series: Iridium IX
  • Part Number: BPR8EIX
  • Stock Number: 6684
  • Heat Range: 8
  • Thread Diameter: 14mm
  • Thread Pitch: 1.25mm
  • Thread Reach: 19mm (0.750 inch)
  • Hex Size: 21mm (13/16 inch)
  • Seat Type: Gasket
  • Center Electrode: Iridium
  • Ground Electrode: Nickel
  • Center Electrode Diameter: 0.6mm
  • Preset Gap: 0.8mm (0.032 inch)
  • Resistor: 5,000 Ohms
  • Terminal Type: Removable Nut

Performance Benefits

  • Fine-wire iridium electrode supports reliable ignition
  • Excellent resistance to electrode wear
  • Helps maintain consistent combustion under demanding conditions
  • Designed for performance-oriented engines
  • Corrosion-resistant shell coating for long-term durability

Vehicle Fitment & Compatibility

The NGK BPR8EIX is designed for engines requiring its specific thread dimensions, heat range, reach, and electrode configuration. It may also serve as an iridium alternative to the NGK BPR8ES (3923) when approved for the application.

Always verify compatibility using the vehicle manufacturer's recommendations or NGK's application guide. Modified engines may require different spark plug heat ranges or electrode gaps depending on their ignition system, fuel type, and operating conditions.

Important Installation Notes

  • Confirm spark plug compatibility before installation
  • Verify the required electrode gap for your application
  • Use the correct torque specification for your cylinder head
  • Install using an appropriate spark plug socket
  • Do not overtighten or damage the fine-wire iridium electrode
  • Professional installation is recommended when modifying ignition specifications

What's Included

  • One NGK Iridium IX BPR8EIX Spark Plug (6684)

Why Buy NGK from JD Customs USA?

JD Customs USA offers genuine NGK ignition components for enthusiasts who demand reliable performance from their engines. Whether maintaining a street car, servicing a modified engine, or preparing a vehicle for motorsport use, choosing the correct spark plug is essential for consistent ignition performance.

Our team understands the importance of spark plug heat ranges, electrode gaps, and engine compatibility. We provide clear product specifications and knowledgeable customer support to help enthusiasts select the appropriate NGK ignition components for their builds.

  • Genuine NGK ignition products
  • Accurate manufacturer part numbers and specifications
  • Support for modified and high-performance engines
  • Knowledgeable automotive enthusiast customer service
  • Secure ordering from an established performance parts retailer

Orders Containing Titanium

Colored Titanium:

  • All titanium is colored to order unless otherwise stated on the item listing. Please see the banner at the top of the website for the current estimated lead times. Production time can vary depending on your order size, products ordered, and the difficulty of custom options requested.

Bare Titanium/Stainless Steel:

  • In-stock items have a processing time of 3-5 business days.

For orders without titanium, our average processing time is 2-4 business days.

  • Fine Wire Center Electrode Ensures High Durability and a Consistently Stable Spark
  • Iridium Alloy has an Extremely High Melting Point, Perfect for Today's High-Tech, High Performance Engines
  • Trivalent Metal Plating Provides Superior Anti-Corrosion and Anti-Seizing Properties
  • Corrugated Ribs Prevent Flashover
  • Pure Alumina Silicate Ceramic Insulator, Provides Superior Strength and Better Heat Transfer
  • Copper Core Aids in Heat Removal
  • Triple Seals Prevent Leakage

NGK

NGK is a globally recognized leader in the manufacturing of high-performance ignition components, including spark plugs, ignition coils, and oxygen sensors. Known for their precision engineering and superior quality, NGK products are designed to enhance engine performance, fuel efficiency, and emissions control. Trusted by automotive manufacturers, professional mechanics, and racing teams worldwide, NGK continues to set the standard for reliable and durable ignition solutions across a wide range of vehicles.

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