A-Premium Iridium Platinum Spark Plugs Pack of 6 for GM V6 (3.5L/3.9L) — Fine-Wire, 0.044in Gap

A-Premium Iridium Platinum spark plugs pack of 6 delivers precise ignition and extended service life for select GM V6 engines.

These fine-wire iridium center tip/platinum core spark plugs are built for stable combustion in V6 applications. Designed with OEM-style dimensions and a 0.044 inch gap, this six-piece set matches the form and fit of many General Motors vehicles from mid-2000s to early 2010s, offering a balance of cold-start performance and long-term durability.

Which vehicles will these spark plugs fit?

These plugs are selected for a range of Buick, Chevrolet, Pontiac and Saturn models equipped with 3.5L and 3.9L V6 engines during the 2006–2011 model years. Verify your engine code or consult the parts reference numbers before purchase to ensure proper fitment.

• Buick: Lucerne 2009–2011 (3.9L), Terraza 2006–2007 (3.9L)
• Chevrolet: Impala 2006–2011 (3.5L/3.9L), Malibu 2006–2010 (3.5L/3.9L), Monte Carlo 2006–2007
• Pontiac & Saturn models: G6, Montana, Aura, Vue, Relay with compatible V6 engines

What are the key specifications and materials?

The A-Premium set combines an iridium-tipped center electrode with a platinum core for a durable, low-wear spark contact. Thread size, reach and hex dimensions match OEM guidance so installation is straightforward using common spark-plug tools.

• Center electrode tip: iridium; center core: platinum
• Resistance: 5000 ohms; gap: 0.044 in; hex: 5/8 in
• Insulator height: 53.00 mm; reach: 17.98 mm; thread diameter: 14 mm
• Reference numbers: 4213, IZTR4A-11, XP106, IZTR4A11, 12591131

How do these plugs affect performance and maintenance intervals?

Iridium and platinum materials are chosen to maintain a consistent spark over many miles, reducing misfires and helping the engine run smoothly as components age. Though individual results vary, these plugs are engineered to remain effective far longer than conventional copper plugs.

• Engineered for reliable ignitability across temperature ranges
• Recommended replacement interval: approximately 80,000–100,000 miles for optimal longevity
• Works well with stock ignition coils and factory ignition timing

What should I know about installation and compatibility checks?

Installation requires standard spark plug sockets and following the vehicle manufacturer’s torque specs. Always confirm the reference numbers and engine size to avoid misfit, and inspect coil boots and wiring for wear while replacing plugs.

• Use a 5/8 in socket and torque to manufacturer spec
• Confirm gap is 0.044 in before installation; adjust only if necessary
• Replace worn spark plug boots or ignition wires during service for best results

Who this is for: These A-Premium iridium platinum spark plugs are intended for owners, mechanics and fleet managers maintaining mid-2000s GM V6 sedans, minivans and crossovers who want an OEM-style replacement that emphasizes long life and consistent ignition. If you drive a compatible Buick, Chevrolet, Pontiac or Saturn with a 3.5L or 3.9L V6 and you prefer a long-interval, low-maintenance plug, this six-pack is a practical choice. Confirm your vehicle’s engine size and part references before ordering to ensure correct fitment.