C6 Corvette NGK Iridium IX Spark Plugs - LS3

NGK Iridium IX TR5IX Spark Plugs for C6 Corvette LS3

NGK Iridium IX TR5IX spark plugs, stock number 7397, fit the 2008–2013 C6 Corvette with the LS3 6.2L engine in stock configuration. This offer includes eight spark plugs supplied as two packs of four for a complete V8 plug service.

For a 6.2L LS3 C6, a full plug service means fitting the same replacement design in all eight cylinders. The fine iridium center tip supports a consistent spark and resists wear, and the plated shell helps protect the threads when servicing the engine. This set brings the complete plug quantity together for owners maintaining their stock LS3 for everyday use or weekend drives.

Product Details

• NGK stock number: 7397; design code: TR5IX.
• Fine-wire iridium center electrode: A durable firing tip designed to maintain a consistent spark.
• Full eight-plug quantity: Two manufacturer packs of four for one V8 engine.
• 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

• A matching set: Replace all eight plugs with the same Iridium IX design in one order.
• Wear-resistant firing tip: Iridium supports stable ignition while resisting electrode wear.
• Clear LS3 service selection: Match your 2008–2013 Base coupe or convertible to one complete plug order.

Important Notes

• LS3 year range: This set fits the 2008–2013 C6 Corvette Base coupe and convertible with the 6.2L LS3. Confirm both the engine and model year when choosing your service parts.
• Factory transmission choices: Manual and automatic LS3 cars use this same eight-plug offer. Transmission choice does not require a different quantity of plugs.
• 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 LS3 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. Move only the ground electrode if adjustment is needed, without levering against the center tip. Ask a qualified installer before making a large adjustment.
• Dry threads and correct torque: Do not add anti-seize or lubricant. Follow the vehicle tightening specification. An engine builder or tuner should confirm plug requirements for a modified engine.

CORVETTE COMPATIBILITY

• 2008–2013 C6 Corvette Base
• Coupe and convertible
• LS3 6.2L engine, 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 7397 TR5IX Iridium IX spark plugs for your C6 Corvette LS3? Contact us for personal help before you order.