NGK Iridium IX Spark Plug Box of 4 (WR5IX)
NGK Iridium IX Spark Plug Box of 4 (WR5IX)
A$106.17
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Description
NGK Iridium IX Spark Plug Box of 4 (WR5IX)
The improved throttle response, superior anti-fouling and high-ignitability makes Iridium IX® the ideal choice for any performance enthusiast. Iridium's high melting point is perfectly suited to today's high-temperature engines, delivering outstanding acceleration, fuel efficiency and durability.
Additional Information
NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability.
Application Summary
DODGE 1995-94; FORD 1986-55; LINCOLN 1972-52; MERCURY 1983-55
Part Type
Spark Plug
Product Overview
NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.
| Additional Application Notes | |
|---|---|
| • Gap 0.035" | |
| • Gap 0.034" | |
| • Gap 0.030" | |
| • Gap 0.044" | |
| • Gap 0.034" 18mm Heads | |
| • Windsor Engine Gap 0.034" | |
| • Gap 0.054" | |
| • Gap 0.050" | |
| • w/o H.O. Gap 0.034" | |
| • Heavy Duty Gap 0.030" | |
| • H.O. Gap 0.034" | |
These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.
Data: v2 - Desc: v4.2 - Upd: 2026-11-08 06:18:02
Features
- Fine iridium tip ensures durable and consistent spark
- Outstanding acceleration, high fuel efficiency and durability
- RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs
- Trivalent metal plating for superior anti-corrosion and anti-seizing properties
Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.
Specifications
Product Details
| 557: | 18.00 |
| Center Electrode Core Material: | Copper |
| Center Electrode Tip Material: | Iridium |
| Description: | NGK Iridium IX Spark Plug |
| Electrical Terminal Type: | Non-Removable Nut |
| Ground Configuration: | Standard |
| Ground Electrode Core Material: | Nickel |
| Ground Electrode Quantity: | 1 |
| Ground Electrode Tip Design: | Taper Cut |
| Hex Size: | 13/16 |
| Insulator Height: | 60.00 |
| Manufacturer Heat Range: | 5 |
| Part Number: | WR5IX |
| Pre-Gap Size: | .040 |
| Reach: | .429 |
| Resistance: | 5000.0 |
| Seat Type: | Tapered |
| Stock Number: | 7510 |
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | Ngk, Ngk Spark Plugs |
| StreetFX SKU | ngk7510 |
| SFX Item ID | 4149897 |
| Accounting SKU | ngk-7510 |
| Manufacturer SKU | 7510 |
| Manufacturer UPC | 87295175101 |
Compatibility
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