SKU: 9723 | UPC: 87295197233
NGK Iridium Spark Plugs (SILZKR7B11) – Box of 4
The NGK Iridium Spark Plugs (SILZKR7B11) are a high-performance ignition upgrade designed for a wide range of vehicles. Each plug features a fine-wire iridium center electrode and a platinum pad or fine-wire ground electrode for superior spark performance, durability, and consistent combustion. The high-grade alumina ceramic insulator and 98% pure copper core provide excellent heat dissipation and resistance to fouling, while the trivalent metal plating offers superior corrosion and seizure resistance. Pre-gapped at approximately 0.044″ (with minor adjustment recommended for some applications), these plugs deliver reliable starts, smoother idling, improved throttle response, and better fuel efficiency. Sold as a box of 4, they are an excellent OE-style replacement or performance upgrade for daily drivers and modified vehicles alike. Trusted by manufacturers and enthusiasts worldwide for over 80 years.
Key Features
- Iridium Center Electrode – Fine-wire design for stronger, more focused spark and long life
- Platinum Ground Electrode – Promotes even wear in distributorless ignition systems
- High-Grade Alumina Ceramic Insulator – Excellent heat resistance and electrical insulation
- 98% Pure Copper Core – Superior heat dissipation for reliable starts and performance
- Trivalent Metal Plating – Corrosion and seizure resistance
- Box of 4 – Complete set for many 4-cylinder applications
| Spec | Detail |
|---|---|
| Part Number | 9723 |
| Brand | NGK |
| Type | Iridium Spark Plugs (SILZKR7B11) |
| Quantity | Box of 4 |
| Gap (Pre-gapped) | 0.044″ (may require slight adjustment for specific vehicles) |
| Country of Origin | Japan |
| Warranty | NGK Limited Warranty |
Whats Included
- Box of 4 NGK Iridium Spark Plugs (SILZKR7B11)
Product Notes
- Designed for a wide range of vehicles including Chrysler, Dodge, Hyundai, Jeep, Kia, Ram, Subaru, and Volkswagen models
- Excellent choice for daily driving, performance, and modified engines
- Gap adjustment may be required for certain applications (e.g., some Subaru models recommend 0.039″–0.043″)
- Professional installation recommended
Installation Notes
- Replace spark plugs following factory service intervals or when tuning
- Use anti-seize on threads and torque to manufacturer specifications
- Estimated time: 30–90 minutes depending on vehicle
This Part Fits
| Year Range | Make | Model | Submodel / Notes |
|---|---|---|---|
| 2011-2017 | Chrysler | 200 | C, Limited, LX, S, Touring |
| 2011-2020 | Chrysler | 300 | Base, C, C Luxury, C Platinum, Limited, S, Touring, Touring L |
| 2011-2016 | Chrysler | Town & Country | Limited, Touring, S, LX, Limited Platinum, 30th Anniversary Edition |
| 2011-2014 | Dodge | Avenger | Express, Heat, Lux, Mainstreet, R/T, SE, SXT, SXT Plus |
| 2017-2020 | Dodge | Challenger | GT, Rallye Redline, SE, SXT, SXT Plus |
| 2011-2020 | Dodge | Charger | GT, Pursuit, SE, SXT, SXT Plus |
| 2011-2015 | Dodge | Durango | Citadel, Crew, Express, Heat, Limited, Rallye, Special Service, SXT |
| 2011-2020 | Dodge | Grand Caravan | American Value Package, C/V, Crew, Express, GT, Mainstreet, R/T, SE, SE Plus, SXT, SXT 30th Anniversary |
| 2011-2019 | Dodge | Journey | Crew, Crossroad, GT, Limited, Lux, Mainstreet, R/T, SE, SXT |
| 2010-2017 | Hyundai | Azera | Base, Limited |
| 2012-2016 | Hyundai | Elantra | GLS, Limited, SE, Sport, Value Edition, Coupe GS/SE |
| 2013-2020 | Hyundai | Elantra GT | Base |
| 2010-2016 | Hyundai | Genesis Coupe | 3.8, 3.8 Grand Touring, 3.8 R-Spec, 3.8 Track, 3.8 Ultimate |
| 2010-2018 | Hyundai | Santa Fe | GLS, Limited, SE, Limited Ultimate, SE Ultimate, XL Limited Ultimate, XL SE |
| 2014-2020 | Hyundai | Tucson | GLS, SE, SEL, SEL Plus, Value Edition |
| 2014 | Subaru | Legacy | 2.5i Sport |
| 2011-2020 | Jeep | Cherokee | 75th Anniversary, Altitude, High Altitude, Latitude, Limited, Overland, Sport, Trailhawk |
| 2011-2015 | Jeep | Grand Cherokee | Laredo, Limited, Overland, Overland Summit, Summit |
| 2012-2018 | Jeep | Wrangler / Wrangler JK | 75th Anniversary, Rubicon, Sahara, Sport, Sport S, Unlimited Rubicon, Unlimited Sahara, Unlimited Sport, Unlimited Sport S |
| 2011-2018 | Kia | Cadenza | Base, Limited, Premium |
| 2014-2018 | Kia | Forte / Forte Koup / Forte5 | EX, LX |
| 2011-2018 | Kia | Sedona | EX, L, Limited, LX, SX, SX Limited, SXL |
| 2011-2018 | Kia | Sorento | EX, Limited, LX, SX, SX Limited |
| 2012-2019 | Kia | Soul | !, + |
| 2014-2018 | Ram | 1500 / 1500 Classic | Big Horn, Express, HFE, Laramie, Lone Star, Outdoorsman, Rebel, SLT, Sport, Tradesman, Warlock |
| 2012-2015 | Ram | C/V | Base, Tradesman |
| 2014-2020 | Ram | ProMaster 1500/2500/3500 | Base |
| 2011-2014 | Volkswagen | Routan | S, SE, SEL, SEL Premium |
Why Choose NGK Spark Plugs?
- Leading OE supplier with over 80 years of expertise in spark plug technology
- Superior iridium and platinum construction for long life and consistent performance
- Trusted by manufacturers and enthusiasts for reliability and quality
Frequently Asked Questions
- Q: Are these plugs pre-gapped?
A: Yes, pre-gapped at approximately 0.044″. Slight adjustment may be needed for certain applications (e.g., some Subaru models recommend 0.039″–0.043″). - Q: How many plugs are included?
A: This is a box of 4 spark plugs. - Q: Is professional installation recommended?
A: Yes, proper gapping, torquing, and anti-seize application are important for optimal performance and engine safety.
Shipping & Handling
- Method: Ground UPS or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Secure NGK retail packaging
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