NGK Iridium IX TR5IX Spark Plugs for C5 Corvette Z06 LS6
NGK Iridium IX TR5IX spark plugs, stock number 7397, fit the 2001–2004 C5 Corvette Z06 with the LS6 5.7L engine. This offer includes eight spark plugs supplied as two packs of four.
Refresh the ignition service parts on your LS6 with a matched eight-plug set. Fine-wire iridium tips support consistent ignition and electrode durability, giving your road-driven Z06 a complete replacement quantity without piecing together individual plugs. The plated shells also resist corrosion, helping with removal when future maintenance comes around. Keep the condition of your separate plug wires and coils in mind when planning the job.
Product Details
- NGK stock number: 7397; design code: TR5IX.
- Fine-wire iridium center electrode: A durable firing tip designed to maintain a consistent spark.
- Eight spark plugs: Two manufacturer packs of four, enough for one V8.
- Spark plugs only: Plug wires and ignition coils are separate components and are not included.
- Trivalent shell plating: Helps resist corrosion and supports removal at a later plug service.
Benefits
- One complete plug order: Replace all eight plugs with a matching Iridium IX design.
- Durable firing tip: Iridium resists electrode wear while supporting stable ignition.
- Service-friendly protection: Plated shells help protect the threads when your LS6 is due for its next plug change.
Important Notes
- Z06 fitment: This set is for the 2001–2004 C5 Z06 fixed-roof coupe with the 5.7L LS6 and manual transmission in stock configuration.
- Modified LS6 engines: Confirm plug requirements with your engine builder or tuner if compression, induction or engine calibration has changed. Choose the plugs for the actual build before starting your service.
- Check before fitting: Confirm TR5IX and 7397 on the plugs and packaging, then inspect the ceramic insulators and electrodes for damage.
- Installation gap: Use 0.040 inch for this stock LS6 fitment. Measure every plug before installation; the supplied gap is not a substitute for the vehicle’s required setting.
- Protect the fine tip: Use a round-wire or pin gauge. Any adjustment must move only the ground electrode without levering against the center tip. Ask a qualified installer if a large adjustment is needed.
- Dry threads and correct torque: Do not add anti-seize or lubricant. Use the correct spark-plug socket and follow the vehicle’s tightening specification so the plug seats correctly and transfers heat as intended.
CORVETTE COMPATIBILITY
- 2001–2004 C5 Corvette Z06
- LS6 5.7L engine, stock configuration
- Fixed-roof coupe
- Manual transmission
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 7397 TR5IX Iridium IX spark plugs for your C5 Corvette Z06 LS6? 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.
