NGK G-Power TR5GP Platinum Spark Plugs for C5 Corvette LS1
NGK G-Power TR5GP platinum spark plugs, stock number 3186, fit the 1997–2004 C5 Corvette LS1 with its stock LS1 5.7L V8. This offer supplies eight spark plugs as two manufacturer packs of four, giving you a complete engine set for scheduled spark-plug replacement.
For an LS1-powered C5 used on the road, G-Power combines a 0.6 mm fine-wire platinum center electrode with a trapezoidal ground electrode. The fine center tip focuses the spark, while the ground-electrode shape reduces interference with early flame development. A copper core helps carry heat away from the firing end during normal engine operation.
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 coupe, convertible or Fixed Roof Coupe, with the correct quantity already grouped for the job.
Important Notes
- Body-style years: Match your LS1 coupe to 1997–2004, convertible to 1998–2004, or Fixed Roof Coupe to 1999–2000. Those body-style dates keep the service set matched to your C5.
- Fixed Roof Coupe selection: A 1999–2000 FRC retains the 5.7L LS1 fitment covered here. Confirm the engine in the car when ordering, especially if its service history includes an engine replacement.
- Application gap: Use 0.040 inch (1.02 mm) for this stock LS1 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
- 1997–2004 C5 Corvette LS1 coupe
- 1998–2004 C5 Corvette LS1 convertible
- 1999–2000 C5 Corvette LS1 Fixed Roof Coupe
- LS1 5.7L V8, stock configuration
- Manual and automatic transmissions; FRC manual
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 C5 Corvette LS1? Contact us for personal help before you order.
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