A-NAFTULY Iridium Spark Plugs 8-Pack 91418 for GM 5.3L/6.2L V8 — 0.6mm Tip, Laser-Welded Durability

A-NAFTULY Iridium Spark Plugs 8 Pack 91418 are precision iridium replacement plugs engineered to restore stable ignition and efficient combustion in GM 5.3L and 6.2L V8 engines from 2014–2023.

These eight high-performance spark plugs are built with a fine 0.6mm iridium center electrode and laser-welded construction intended for long service life and consistent spark delivery. They match multiple OE references and are designed specifically for many Chevrolet, GMC and Cadillac V8 models, offering an affordable alternative to dealer parts without sacrificing fit or function. The set aims to reduce common ignition symptoms like misfires and rough idle while improving fuel efficiency when used as part of a properly maintained ignition system.

Which vehicles are these A-NAFTULY 91418 plugs compatible with?

These spark plugs cover a wide range of GM V8 applications across model years 2014–2023. Refer to your vehicle’s service manual and the part references to confirm fitment before ordering.

• Chevrolet: Silverado 1500 (5.3L/6.2L), Silverado 2500/3500 HD (6.6L), Tahoe, Suburban, Camaro, Corvette
• GMC: Sierra 1500, Sierra 2500/3500 HD, Sierra 1500 Limited, Yukon, Yukon XL
• Cadillac: Escalade and Escalade ESV with 6.2L V8
• Cross-references include 91418, ILTR5E11, 12598004 and others for verification

How do these iridium plugs affect fuel economy and performance?

The fine iridium tip concentrates the spark energy, promoting more complete combustion and smoother throttle response. Better ignition consistency can help your engine run more efficiently under normal operating conditions.

• 0.6mm iridium center electrode for a strong, focused spark
• Laser-welded tip for consistent electrical contact and longevity
• Designed to address misfires, rough idle, and poor fuel economy caused by worn plugs
• Provides stable ignition across common engine speeds

What symptoms might indicate it’s time to replace my spark plugs?

If your vehicle shows ignition-related problems, worn spark plugs are a common and cost-effective starting point to inspect. Changing to a fresh set of iridium plugs can often resolve several driveability issues when coils and wiring are in good condition.

• Engine misfire codes or intermittent misfiring under load
• Rough idling, stalling, or inconsistent throttle response
• Noticeable drop in fuel efficiency or engine hesitation
• Visible electrode erosion or excessive carbon buildup on removed plugs

What’s included and what support does A-NAFTULY provide?

The product ships as a package of eight iridium spark plugs with quality checks performed during production. A-NAFTULY backs the set with customer support and a limited warranty period to help resolve fitment or performance concerns.

• Package contains 8 A-NAFTULY iridium spark plugs (91418 compatible)
• Manufacturing references listed for cross-checking OEM numbers
• 12-month limited warranty and responsive customer support
• Sold as replacement plugs; professional installation recommended for best results

Who is this for: Drivers and DIY technicians who own GM trucks and SUVs with 5.3L or 6.2L V8 engines and want a long-lasting, OEM-replacement style spark plug at a competitive price. If your vehicle’s coils and wiring are in good condition and you’re troubleshooting misfires, rough idle, or lowered fuel economy, this 8-pack offers a practical upgrade with iridium durability for day-to-day driving and towing duties.