Ignition Coil and Iridium Spark Plugs for Chevrolet HHR (2008-2010) 2.0L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2008-2010 Chevrolet HHR

What it Does: Restores high-energy secondary ignition voltage and precise spark timing to eliminate boost misfires and rough idle on direct-injected turbocharged 2.0L engines.

The Stock HHR Ignition Breakdown

Direct-injected turbocharged engines generate extreme combustion chamber pressures and high thermal cycles under the hood. Over time, OEM coil packs suffer from dielectric epoxy degradation and internal thermal fatigue, causing micro-arcing and secondary voltage leakage. Combined with worn spark plug gap erosion, this leads to spark blowout under boost, sluggish throttle response, unburned hydrocarbon buildup, and recurring P0300-P0304 misfire codes.

The Engineering Solution

This complete ignition overhaul kit pairs reinforced coil-on-plug assemblies with fine-wire iridium spark plugs. The coils feature high-purity internal copper windings vacuum-potted in premium dielectric epoxy to withstand excessive thermal stress and resist voltage breakdown. The matched iridium plugs provide an ultra-fine center electrode for a concentrated flame kernel, lower required firing voltage, and superior resistance to erosion under high boost and cylinder pressures.

Technical Specifications

Compatibility

• 2008 Chevrolet HHR SS 2.0L L4 Turbocharged Gas
• 2009 Chevrolet HHR SS 2.0L L4 Turbocharged Gas
• 2010 Chevrolet HHR SS 2.0L L4 Turbocharged Gas

The Chevrolet Performance Caliber

Engineered to deliver clean combustion and stable flame propagation under maximum load, this kit preserves factory boost levels and crisp throttle response across the powerband without triggering check engine lights.