NGK Ruthenium HX LTR5AHX Spark Plugs for C7 Corvette Grand Sport LT1
NGK Ruthenium HX LTR5AHX spark plugs, stock number 90220, fit the 2017–2019 C7 Corvette Grand Sport with the stock LT1 6.2L V8. This offer supplies eight spark plugs as two manufacturer packs of four for a complete spark-plug replacement and regular street maintenance.
For a stock C7 Grand Sport, spark-plug selection follows the naturally aspirated 6.2L LT1 under the hood. Ruthenium HX uses opposed fine firing tips in a Double Fine Electrode layout: ruthenium alloy at the center and platinum on the ground electrode. That design supports high ignitability and firing-tip durability for street-driven Grand Sport coupes and convertibles.
Product Details
- Exact product: NGK 90220, design code LTR5AHX, Ruthenium HX.
- Double Fine Electrode design: A fine ruthenium-alloy center firing tip works opposite a fine platinum ground tip.
- Precious-metal construction: The firing-tip materials combine high ignitability with resistance to electrode wear.
- Complete V8 quantity: Eight matching plugs in two four-packs; order quantity one supplies one engine.
- Package contents: Spark plugs only. Ignition wires and coils are separate components and are not included.
Benefits
- High-ignitability firing end: The DFE arrangement helps the spark initiate combustion of the air-fuel mixture.
- Wear-resistant firing tips: Precious-metal electrode surfaces help maintain the firing end through repeated sparking during normal street service.
- Grand Sport road-use service: Fit eight matching plugs when refreshing the stock LT1 for everyday drives and weekend outings.
Important Notes
- Grand Sport year break: C7 Grand Sport coverage begins with the 2017 model year and continues through 2019. Match that model-year range with the stock naturally aspirated LT1 6.2L before selecting your replacement plugs.
- Your Grand Sport configuration: Coupe and convertible body styles are covered with manual or automatic transmissions. Check the existing plug-wire boots and follow the LT1 service procedure when removing and installing the plugs.
- Installation gap: Use 0.040 inch (1.02 mm) for this stock LT1 fitment. Measure every plug before installation; the supplied preset is not a substitute for the vehicle-specific setting.
- Protect the firing tips: Use a round-wire or pin gauge to check the gap. Any adjustment must move only the ground electrode without pressure on the center tip or ceramic insulator.
- Dry-thread installation: Install these NGK plugs without anti-seize or lubricant on the threads. Added lubricant changes the tightening conditions, so keep the threads dry and use the vehicle’s specified installation procedure.
- Inspect before fitting: Check each replacement plug for handling damage before installation. If a plug has been dropped or its fine firing tips appear damaged, have it checked before use.
- Modified engines: Have your engine builder or tuner confirm spark-plug requirements if your LT1 has been modified.
CORVETTE COMPATIBILITY
- 2017–2019 C7 Corvette Grand Sport
- Coupe and convertible
- LT1 6.2L naturally aspirated V8, stock configuration
- Manual and automatic transmissions
Why Buy from Custom Corvette Accessories?
At Custom Corvette Accessories, we’re Corvette owners ourselves, and we offer one-on-one customer service to help you choose parts for your car. Have a question about NGK 90220 LTR5AHX Ruthenium HX spark plugs for your C7 Corvette Grand Sport LT1? Contact us for personal help before you order.
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