NGK Ruthenium HX LTR5AHX Spark Plugs for C7 Corvette Stingray LT1
NGK Ruthenium HX LTR5AHX spark plugs, stock number 90220, fit the 2014–2019 C7 Corvette Stingray 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.
Whether your Stingray is a coupe or convertible, the naturally aspirated 6.2L LT1 uses eight plugs for a complete service. Ruthenium HX combines a ruthenium-alloy center firing tip and fine platinum ground tip in its Double Fine Electrode design. That compact firing arrangement promotes ignitability and durable operation for stock-engine street use, with the same plug selection for manual and automatic cars.
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.
- Stingray service convenience: Refresh every cylinder with a matching LTR5AHX plug during routine maintenance on your coupe or convertible.
Important Notes
- Stingray model coverage: This LTR5AHX set covers the 2014–2019 C7 Stingray with its stock naturally aspirated LT1 6.2L. Confirm the LT1 engine and Stingray model together before ordering, including on a used car with an unknown modification history.
- Coupe, convertible and transmission: Both Stingray body styles are covered with manual or automatic transmissions. Inspect the plug-wire boots and connections during replacement, and follow the service procedure for your model year.
- 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
- 2014–2019 C7 Corvette Stingray
- 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 Stingray LT1? Contact us for personal help before you order.
✅ In-stock items ship in 1–2 business days via Standard Ground.
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✅ Custom or backordered items ship as soon as available.
