A-NAFTULY Iridium Spark Plugs 8-Pack for V8 4.8L–6.2L — TR5GP/TR5IX (3186/7397), Long-Life Fine-Wire Iridium

A-NAFTULY Iridium Spark Plugs 8-pack (TR5GP/TR5IX, part numbers 3186/7397) are precision iridium replacement plugs engineered to restore reliable ignition and consistent performance for compatible V8 engines.

These eight spark plugs are designed as direct-fit replacements for many Chevrolet, GMC, Cadillac, Ford, Hummer, Buick, Pontiac and other vehicles equipped with V8 4.8L–6.2L engines. Built with a fine-wire iridium center electrode and high-melting alloy, they aim to deliver long life, steady spark delivery and stable idle characteristics for everyday driving and towing demands. The set includes a 12-month support warranty from A-NAFTULY and ships as a complete eight-plug kit to service a full V8 cylinder bank.

What vehicles will these spark plugs fit?

These plugs cover a wide range of late-1990s through 2019 V8 applications from GM and select Ford/Hummer platforms. Compatibility includes Silverado, Sierra, Tahoe, Yukon, Avalanche, Escalade, Camaro, Savana, and many more—check your engine size and year.

• Fits Chevy V8s: 4.8L, 5.3L, 6.0L (Silverado, Tahoe, Camaro, Avalanche, Impala listings)
• Fits GMC/Cadillac: Sierra, Yukon, Escalade models 1999–2019 where specified
• Also fits select Ford/Hummer/Pontiac/Buick models with compatible V8 engines
• Cross-references: 7397, TR5IX, 3186, TR5GP and many OEM equivalents listed in product details

How does iridium construction benefit my engine?

The iridium fine-wire center electrode resists wear and maintains a stable gap longer than conventional metals. This helps preserve consistent spark energy and more reliable combustion over extended service intervals.

• Iridium alloy center electrode with high melting point for improved longevity
• Fine-wire design requires less voltage to fire, aiding cold starts and idle stability
• Reduced electrical and thermal erosion compared with standard plugs
• Designed for modern high-compression and high-energy ignition systems

Are these plug set and installation ready for my vehicle?

The package contains eight pre-configured spark plugs—enough for most V8 banks—so no single-plug purchases are necessary when servicing the full engine. Always confirm OEM part equivalents and gap settings before fitting, and use recommended torque and anti-seize practices if required by your vehicle.

• Contains an 8-plug set suitable for most V8 cylinder banks
• Pre-specified references included (TR5GP, TR5IX, 7397, 3186) for parts lookup
• Verify plug gap and torque per vehicle service manual prior to installation
• Recommended for do-it-yourself or professional installation with correct tools

What support and warranty does A-NAFTULY provide?

A-NAFTULY includes a 12-month worry-free warranty and customer support to help resolve fitment or quality concerns. Keep proof of purchase and vehicle details handy when contacting support for faster assistance.

• 12-month warranty included with the eight-plug kit
• Customer support available for fitment questions and replacements
• Return or exchange guidance offered through the A-NAFTULY store

Who is this for? The A-NAFTULY Iridium Spark Plugs 8-pack is aimed at owners and mechanics servicing GM and compatible V8 engines who want a long-lasting, high-temperature-resistant plug that matches OEM form and function. It's a practical upgrade for vehicles used in daily driving, hauling, or light towing where consistent ignition and extended service intervals are priorities. If you need an eight-plug replacement set with iridium durability and broad V8 fitment, this kit is built to be a direct, reliable replacement option.