NGK Ruthenium HX TR5AHX Spark Plugs for C6 Corvette Grand Sport LS3
NGK Ruthenium HX TR5AHX spark plugs, stock number 94567, fit the 2010–2013 C6 Corvette Grand Sport with the LS3 6.2L engine in stock configuration. This offer includes eight spark plugs supplied as two manufacturer packs of four for a full V8 spark-plug replacement.
Your Grand Sport’s naturally aspirated 6.2L LS3 needs eight matching plugs for a full replacement. Ruthenium HX uses opposed fine firing tips, with ruthenium alloy at the center and platinum on the ground electrode. This double-fine-electrode construction supports ignition of the mixture and durable street-service operation in a stock Grand Sport coupe or convertible.
Product Details
- Exact plug identity: NGK 94567, design code TR5AHX, Ruthenium HX.
- Double Fine Electrode design: Fine ruthenium-alloy center and platinum ground firing tips support high ignitability.
- Precious-metal firing surfaces: The ruthenium-alloy center tip provides resistance to wear during repeated sparking.
- Complete V8 quantity: Eight matching plugs in two four-packs; select order quantity one for one engine.
- Included components: Spark plugs only. Plug wires and ignition coils are separate and are not included.
Benefits
- High-ignitability construction: Opposed fine tips help the spark initiate combustion of the air-fuel mixture.
- Wear-resistant firing surface: The ruthenium-alloy center electrode helps resist wear over repeated ignition cycles during regular street use.
- Grand Sport service convenience: Replace the full LS3 plug set in one service, whether your street-driven Grand Sport is a coupe or convertible.
Important Notes
- Grand Sport fitment: Choose this set for the 2010–2013 C6 Grand Sport with the stock 6.2L LS3. Match the Grand Sport trim, model year and engine together when planning your ignition service.
- Body and transmission coverage: The Grand Sport coupe and convertible are included with manual or automatic transmissions. Each configuration takes eight plugs, supplied here as two manufacturer four-packs.
- Installation gap: Use 0.040 inch (1.02 mm) for this stock LS3 fitment. Measure every plug before installation; do not assume the gap supplied in the box is the required vehicle setting.
- Protect both firing tips: Check with a round-wire or pin gauge. Any adjustment must move only the ground electrode without pressure on the center tip; ask a qualified installer if unsure.
- Installation care: Use clean, dry threads without anti-seize and follow the vehicle tightening specification. Have your engine builder or tuner confirm plug requirements if the engine has been modified.
CORVETTE COMPATIBILITY
- 2010–2013 C6 Corvette Grand Sport
- Coupe and convertible
- LS3 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 94567 TR5AHX Ruthenium HX spark plugs for your C6 Corvette Grand Sport LS3? Contact us for personal help before you order.
✅ In-stock items ship in 1–2 business days via Standard Ground.
✅ Free shipping items are available in the Continental US only.
✅ Custom quotes available for 2-Day, Next Day, or Saturday delivery.
✅ Custom or backordered items ship as soon as available.
