A-NAFTULY Iridium Spark Plugs 6-Pack for V6 Engines — TR55IX 7164, Long Life & Improved Start

A-NAFTULY Iridium Spark Plugs 6-pack (7164 / TR55IX / TR55GP) are high-durability replacement plugs engineered to restore consistent ignition for many Chevy, GMC, Ford, Buick and Pontiac V6 engines from the 1990s through 2013.

If your vehicle shows rough idle, harder cold starts, or reduced throttle response, worn spark plugs are a common culprit. These A-NAFTULY iridium plugs use a fine iridium center electrode and robust construction to deliver reliable spark performance and long service life. The set of six covers typical V6 cylinder banks and includes a 12-month support warranty from the seller.

Which engines and models do these plugs replace?

These plugs are designed as direct-fit replacements for a wide range of GM and Ford V6 engines plus several Buick and Pontiac models. Compatibility covers many Chevrolet Silverado, Tahoe, Camaro and Impala V6 applications, GMC Sierra/Sonoma/Jimmy models, Ford Explorer/Escape/Mustang and others across model years listed. Always verify your factory part number or thread size before purchase.

• Reference numbers covered: 7164, TR55IX, 3403, TR55GP, 3951, TR55.
• Common Chevy fits: Silverado 1500 V6 4.3L, Blazer V6 4.3L, Impala, Malibu, Express 1500.
• Common Ford fits: Escape V6 3.0L, Explorer V6 4.0L, Mustang V6 3.8L, Ranger V6 4.0L.
• Also fits many Buick, Pontiac and GMC V6s — check vehicle specifics in product listing.

How do these iridium plugs affect drivability and maintenance?

Iridium-tipped electrodes provide a smaller, more focused spark gap that typically improves combustion stability and can help smoother idling and steadier throttle response compared with older worn plugs. They are built for longer intervals between replacements, reducing the frequency of tune-ups. Note that real-world gains depend on your engine condition and tune.

• Smaller iridium center electrode promotes efficient spark energy transfer.
• Longer electrode life compared to standard copper plugs—fewer replacements.
• Can improve start consistency and reduce misfires on worn systems.
• Installation requires correct gap and torque; follow factory specs.

What comes in the package and what warranty/support is included?

This purchase ships as a boxed set of six iridium spark plugs suitable for V6 engines that require this part number. The seller provides a 12-month limited worry-free warranty and customer support to handle fitment questions or defective items. Keep proof of purchase handy for any warranty requests.

• Package: set of 6 A-NAFTULY iridium spark plugs.
• Warranty: 12-month support from A-NAFTULY store.
• Support: customer service contact for fitment or defect issues.
• Note: follow vehicle manual for correct torque and gap settings.

Are these a direct replacement or do I need modifications?

These are intended as direct-replacement spark plugs for the listed reference numbers and vehicle applications. No engine modifications are required when the plug matches your vehicle’s original specification. Always cross-check the vehicle year, engine size and OEM part number to ensure compatibility and proper fitment.

• Direct-replacement for many OEM reference numbers—no adapter needed if matched correctly.
• Confirm thread size, seat type and gap before installation.
• If unsure, consult a mechanic or your vehicle’s parts department for verification.

Who is this for: These A-NAFTULY iridium spark plugs are a practical upgrade for owners or mechanics servicing V6 Chevrolet, GMC, Ford, Buick and Pontiac vehicles from the 1990s through 2013 who want longer-lived ignition components. They suit anyone replacing worn plugs on V6 engines, shops performing tune-ups on older domestic vehicles, and DIYers who verify fitment and follow proper installation torque and gap procedures.