Ignition Coil & Iridium Spark Plugs for Infiniti QX56 (2007-2010) 5.6L V8

High-Output Ignition Coil & Iridium Spark Plugs for 2007-2010 Infiniti QX56 (VK56DE / JA60)

What it Does: Replaces degraded factory ignition components with high-output coils and iridium-tipped spark plugs to restore optimal combustion, eliminate misfires, and stabilize idle RPM.

The Stock QX56 Ignition Shortcomings

The factory ignition coils on the VK56DE engine are notoriously susceptible to thermal degradation over high mileage. Tucked against the bulky 5.6L V8 block, the OEM coil housings experience severe heat soak cycles that eventually compromise the internal epoxy potting. This thermal stress leads to micro-cracking, internal arcing, and voltage leaks, which manifest as persistent cylinder misfires, sluggish throttle response, and unburnt fuel entering the exhaust tract. Coupled with standard factory spark plugs that erode and widen their electrode gap over time, the ignition system struggles to maintain a consistent spark under load, directly reducing horsepower, diminishing torque output, and triggering erratic check engine light (CEL) codes.

The Engineering Solution

This comprehensive 8-piece ignition pack resolves these inherent VK56DE ignition failures by utilizing high-grade thermal-resistant materials and advanced electrode technology. The replacement ignition coils feature heavy-duty dielectric epoxy and reinforced polymer housings designed to withstand elevated underhood temperatures without cracking or shorting out. Internally, high-conductivity copper wire windings provide a faster charge time and higher voltage output than the factory units. Paired with 8 performance iridium spark plugs, this system ensures a concentrated, stable spark kernel. The ultra-fine iridium center electrode significantly lowers the required firing voltage while maintaining precise gap dimensions over a vastly extended service life. The result is a cleaner fuel burn, restored 320 horsepower capacity, improved low-end torque, and reliable cold starts regardless of ambient temperature.

Technical Specifications

Compatibility

• 2007 Infiniti QX56 Base 5.6L V8
• 2008 Infiniti QX56 Base 5.6L V8
• 2009 Infiniti QX56 Base 5.6L V8
• 2010 Infiniti QX56 Base 5.6L V8

The Infiniti Caliber

Designed for heavy-duty SUV applications, this ignition overhaul ensures your QX56 maintains the towing capacity, throttle consistency, and long-haul durability expected from the rugged VK56DE platform.