Ignition Coil and Iridium Spark Plugs for Infiniti QX56 (2004-2006) 5.6L

Direct-Fit Ignition Coil & Iridium Spark Plug Kit for 2004-2006 Infiniti QX56

What it Does: Restores full primary and secondary ignition efficiency across all eight cylinders to eliminate misfires, rough idle, and unburnt fuel waste.

The Stock QX56 Ignition Breakdown

Under continuous thermal stress inside the enclosed VK56DE engine bay, factory coil-on-plug assemblies suffer from dielectric degradation and insulation breakdown. The internal secondary copper windings experience micro-fracturing due to sustained engine heat soak, while aging spark plug electrodes widen past factory gap specifications. This causes elevated internal resistance, spark blow-out under load, sluggish throttle response, and catalyst-damaging misfires during heavy towing or acceleration.

The Engineering Solution

This comprehensive ignition service kit supplies eight matched ignition coils and eight fine-wire iridium spark plugs designed for direct plug-and-play installation. Built with high-conductivity copper primary/secondary windings, durable thermoplastic boots, and precision blade terminals, each coil delivers a stable, high-voltage discharge. Paired with high-melting-point iridium center electrodes, the system resists gap erosion, minimizes quenching, and guarantees crisp flame-front propagation under all operational loads.

Technical Specifications

Compatibility

• 2004 Infiniti QX56 Base 5.6L V8 (VK56DE, JA60)
• 2005 Infiniti QX56 Base 5.6L V8 (VK56DE, JA60)
• 2006 Infiniti QX56 Base 5.6L V8 (VK56DE, JA60)

The Infiniti Towing & Endurance Standard

Engineered to handle the heavy payload and towing demands of the full-size JA60 platform, this ignition kit delivers reliable cold starts, stable idle dynamics, and uninterrupted combustion efficiency without check-engine lights.