Ignition Coil & Iridium Spark Plugs for Nissan 350Z (2007-2009) 3.5L

High-Output Ignition Coil & Iridium Spark Plugs for 2007-2009 Nissan 350Z (VQ35HR / Z33)

Direct replacement ignition upgrade for the VQ35HR: Restores factory spark energy and cures high-RPM misfires by replacing thermally degraded OEM coils and fouled plugs.

The Stock VQ35HR Ignition Weakness

The VQ35HR engine relies on precise spark timing for its 7,500 RPM redline, but the factory ignition system is highly susceptible to thermal degradation. Enduring extreme engine bay temperatures, the internal epoxy potting in the OEM ignition coils breaks down over time. This continuous thermal cycling causes micro-cracking in the dielectric housing, leading to parasitic voltage leaks. The mechanical result is a weak spark, severe hesitation under heavy load, and dreaded high-RPM misfires. When paired with worn standard spark plugs suffering from rapid electrode erosion, the resulting incomplete combustion significantly reduces throttle response and power output.

The Engineering Solution

This replacement ignition kit resolves the thermal weaknesses of the stock VQ35HR electrical system. The upgraded coils feature advanced high-temperature epoxy and reinforced dielectric housings, providing excellent resistance to localized heat soak and preventing voltage arcing. Optimized internal copper wire windings ensure highly efficient electrical energy transfer, maximizing spark output for complete combustion. Complementing the coils, the included iridium spark plugs utilize an ultra-fine wire center electrode. Iridium's exceptionally high melting point prevents electrode wear, ensuring the spark gap remains mechanically precise over an extended service life. This hardware stabilizes idle vacuum and restores consistent ignition timing.

Technical Specifications

Compatibility

• 2007 Nissan 350Z Base, Enthusiast, Touring, Grand Touring, Nismo (3.5L VQ35HR)
• 2008 Nissan 350Z Base, Enthusiast, Touring, Grand Touring, Nismo (3.5L VQ35HR)
• 2009 Nissan 350Z Enthusiast, Touring, Grand Touring (3.5L VQ35HR Convertible)

The Nissan Z Caliber

Designed to support the high-revving nature of the VQ platform, this ignition hardware restores the precise throttle response and smooth power delivery expected from a properly sorted Z33.