C6 Corvette NGK G-Power Spark Plugs - LS3

NGK G-Power TR5GP Platinum Spark Plugs for C6 Corvette Base LS3

NGK G-Power TR5GP platinum spark plugs, stock number 3186, fit the 2008–2013 C6 Corvette Base LS3 with its stock LS3 6.2L V8. This offer supplies eight spark plugs as two manufacturer packs of four, giving you a complete engine set for scheduled spark-plug replacement.

G-Power brings single-platinum, fine-wire construction to an LS3 maintenance job. Its 0.6 mm center electrode supports focused sparking, and the trapezoidal ground electrode helps the initial flame develop with less quenching. The copper core contributes to heat dissipation, supporting a service set intended for the naturally aspirated 6.2L engine.

Product Details

• Plug identity: NGK 3186, design code TR5GP, G-Power platinum spark plugs.
• Firing-end design: Single platinum center tip, 0.6 mm fine-wire center electrode and trapezoidal ground electrode.
• Internal construction: 98% pure copper core and high-grade alumina silicate ceramic insulation.
• Complete quantity: Two four-packs provide eight matching plugs; select order quantity one to service one V8.
• Included: Spark plugs only. Ignition coils, plug wires and installation tools are separate.

Benefits

• Focused ignition: The fine-wire platinum tip supports ignitability during normal combustion.
• Reduced flame quenching: The ground-electrode shape helps limit interference with the flame as it starts.
• Heat management: A copper core helps dissipate firing-end heat; ceramic insulation supports electrical isolation.
• One complete service set: Replace all eight plugs together in your LS3 coupe or convertible, with the correct quantity already grouped for the job.

Important Notes

• LS3 model-year coverage: This eight-plug set is for the 2008–2013 C6 Base with the naturally aspirated 6.2L LS3. Verify that engine and year combination rather than choosing by the C6 designation alone.
• Your transmission choice: Both manual and automatic LS3 Base cars use the same TR5GP set. For either body style, check plug-wire boots for damage and fully seat each connection when finishing the service.
• Application gap: Use 0.040 inch (1.02 mm) for this stock LS3 fitment. Check each plug before fitting it; the factory setting is not assumed to match the required engine gap.
• Fine-wire care: Measure with a round-wire or pin gauge. If adjustment is needed, move only the ground electrode without levering against the platinum center tip or ceramic insulator.
• Installation: Fit clean, dry threads without anti-seize and follow the vehicle torque specification. Have your engine builder confirm requirements for a modified engine before ordering.

CORVETTE COMPATIBILITY

• 2008–2013 C6 Corvette Base
• 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 3186 TR5GP G-Power platinum spark plugs for your C6 Corvette Base LS3? Contact us for personal help before you order.