NGK Iridium IX TR6IX Spark Plugs for C6 Corvette Z06 LS7
NGK Iridium IX TR6IX spark plugs, stock number 3689, fit the 2006-2013 C6 Corvette Z06 with the LS7 7.0L engine. This offer includes eight spark plugs supplied as two packs of four.
Keep your LS7 plug service consistent with eight matching Iridium IX plugs. The fine iridium center tip supports a stable spark and resists electrode wear, so you can replace the full set on your Z06 rather than mix individual plug designs. For a scheduled Z06 service, that means choosing one plug design across the engine while keeping the existing coil-and-wire arrangement. Check the condition of those separate ignition components as part of your service planning.
Product Details
- NGK stock number: 3689; design code: TR6IX.
- Iridium fine-wire center electrode.
- Eight spark plugs: two packs of four.
- Spark plugs only; plug wires and ignition coils are not included.
- Thread protection: Trivalent metal plating helps protect the steel shell against corrosion and supports plug removal during later service.
Benefits
- Complete V8 quantity: One order supplies all eight replacement plugs.
- Stable spark: The fine iridium tip supports consistent ignition and resists electrode wear.
- Service-friendly shell: Corrosion-resistant plating helps protect the threads and assists removal when your Z06 is due for its next plug service.
Important Notes
- Exact fitment: 2006–2013 C6 Corvette Z06 coupe with the 7.0L LS7 engine in stock configuration.
- Before installation: Check that the replacement plugs and their packaging identify TR6IX, stock number 3689. Inspect the ceramic and electrodes for damage before starting the LS7 service.
- Service information: Keep the TR6IX part identification with your Z06 maintenance records, together with the date and mileage of the replacement. Follow the vehicle’s applicable maintenance guidance for future inspections.
- Confirm the installation gap and tightening specification for your exact vehicle. Do not assume the plug's supplied gap is the required setting.
- Handle the fine tip carefully: Measure with a round-wire or pin gauge. If adjustment is required, move only the ground electrode; do not lever against the iridium center tip.
- Install on dry threads: Do not add anti-seize or lubricant to these NGK plugs. Lubrication can change the clamping load produced by a torque setting.
- Use the correct service specification: Both excessive and insufficient tightening can affect heat transfer or damage the plug. Have a qualified installer handle the work if you are unsure.
- Prepare the engine: Remove and install plugs with the engine cool. Clean the spark-plug holes first so dirt or debris cannot interfere with proper seating.
CORVETTE COMPATIBILITY
- 2006-2013 C6 Corvette Z06
- LS7 7.0L engine, stock configuration
- Coupe
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 3689 TR6IX Iridium IX spark plugs for your C6 Corvette Z06 LS7? 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.
