Ignition Coil & Iridium Spark Plugs for Jeep Grand Cherokee & L (2006-2022) 5.7L 6.1L 6.2L 6.4L V8

High-Output Ignition Coil & Iridium Spark Plugs for 2006-2022 Jeep Grand Cherokee (HEMI V8 / WK WK2 WL)

Engineered for the demanding HEMI V8 platform, this comprehensive ignition kit replaces degrading factory coils and plugs to restore optimal combustion, eliminate misfires, and improve fuel burn across the RPM band.

The Stock Grand Cherokee Ignition Weakness

Over 50,000 to 100,000 miles, the factory OEM ignition coils on the 5.7L, 6.1L, 6.2L, and 6.4L V8 engines suffer from severe thermal degradation. Located directly above the exhaust manifolds, these components are subject to continuous heat soak within the engine bay. This constant thermal cycling breaks down the internal epoxy potting and copper windings over time, leading to secondary voltage drops, weak spark, and eventually, high-RPM misfires or rough idling. Coupled with standard factory spark plugs that erode their center electrodes over time, the ignition system loses its ability to effectively ignite the dense air-fuel mixtures required by high-displacement engines, resulting in a noticeable loss of horsepower and sluggish throttle response.

The Engineering Solution

This comprehensive upgrade utilizes advanced ignition coils wound with high-purity copper wire and insulated with heavy-duty thermal epoxy to resist engine bay heat soak and electrical arcing. The 8x ignition coils deliver a higher secondary voltage output than OEM, ensuring a hotter, more consistent spark even under heavy load or high engine speeds. Paired with 16x precision-gapped Iridium spark plugs—which require two plugs per cylinder on the HEMI dual-spark platform—this kit maximizes flame kernel expansion. The iridium center electrode offers superior wear resistance and a lower voltage requirement to jump the gap, translating to more complete fuel combustion, restored torque, stabilized idle, and improved overall reliability.

Technical Specifications

Compatibility

• 2006-2022 Jeep Grand Cherokee (5.7L V8)
• 2006-2010 Jeep Grand Cherokee SRT8 (6.1L V8)
• 2018-2021 Jeep Grand Cherokee Trackhawk (6.2L V8)
• 2012-2021 Jeep Grand Cherokee SRT (6.4L V8)
• 2021-2022 Jeep Grand Cherokee L (5.7L V8)

The Jeep Durability Standard

Since these vehicles are often subjected to heavy towing, off-road articulation, and sustained highway hauling, a robust ignition system is non-negotiable. Upgrading your HEMI ensures consistent pulling power and rock-solid reliability when you are miles away from the nearest shop or carrying heavy payloads.