NGK SPARK PLUGS - 4055 - Iridium IX Spark Plug - BPR7EIX
When OEM components wear out or fail, riders deserve a replacement that matches or exceeds factory quality. The NGK SPARK PLUGS 4055 is designed with exactly that standard in mind — delivering fit, function, and durability experienced riders can count on. The ultimate in the evolution of spark plug technology and performance from the industry leader, with the iridium electrode is 25% smaller than a platinum electrode, and it's just 1/4 the size of a conventional nickel electrode, with ultra-small diameter center electrode reduces voltage requirement and extends ignition system life. New metal shell plating has enhanced anti-corrosion qualities. Ground Electrode Shape: Grooved. Whether you're performing routine maintenance, addressing a specific failure, or building a machine to a higher performance standard, the 4055 delivers the quality and reliability that NGK SPARK PLUGS riders expect. Sold individually, this spark plug is designed for Street, Off-Road, Watercraft, ATV applications and engineered to install properly and perform consistently from the first use. If you've been running a worn-out or underperforming spark plug, the 4055 is the no-compromise replacement that restores confidence and function to your machine.
Features
- The ultimate in the evolution of spark plug technology and performance from the industry leader
- The iridium electrode is 25% smaller than a platinum electrode, and it's just 1/4 the size of a conventional nickel electrode
- Ultra-small diameter center electrode reduces voltage requirement and extends ignition system life
- New metal shell plating has enhanced anti-corrosion qualities
Specs
- Ground Electrode Shape: Grooved
- Product Name: Spark Plug
- Type: Resistor
- Spark Gap: 0.031"
- Electrode Tip Material: Iridium
- Ground Electrode Configuration: Single
- Center Electrode Projection: Projected
- Electrical Resistance: 5k Ohms
- Riding Style: Street
- Terminal Configuration: Removable Nut
- Units: Each
- Center Electrode Type: Necked Down
- Hex Size: 20.6 mm
- Riding Style: Off-Road
- Style: Iridium IX
- Heat Range: 7
- Riding Style: Watercraft
- Spark Gap: 0.8 mm
- Model: BPR7EIX
- Riding Style: ATV
- Thread Reach: 19.1 mm
Frequently Asked Questions - NGK SPARK PLUGS - 4055 - Iridium IX Spark Plug - BPR7EIX
How do I know if this part fits my vehicle?
Check the fitment information listed on this page against your exact year, make, model, and (where applicable) trim, engine size, or configuration. If your exact vehicle isn't listed, or you're not sure, use the product chat on this page or contact our support team before ordering - we're glad to help confirm fitment.
What does it mean if a product is listed as universal fit?
Universal fit means the product is designed to work across a range of vehicles, not that it's guaranteed to fit every one. Compare the listed measurements, mounting requirements, and connector or hardware specs against your specific vehicle before ordering, since some installations may need additional hardware or minor fabrication.
Where can I find installation instructions for this product?
General installation notes are provided above where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat on this page for questions about difficulty, required tools, or whether professional installation is recommended.
What if I have more questions about this product?
Use the product chat on this page for fitment, specs, installation, and compatibility questions, or contact our support team directly for help before you order.
