Ignition Coil and Iridium Spark Plugs for Subaru Legacy (2010-2011) 3.6L

High-Dielectric Ignition Coil and Iridium Spark Plug Kit for 2010-2011 Subaru Legacy

Primary Function: Restores precise ignition timing and primary-to-secondary spark energy across all six cylinders to eliminate high-load misfires and rough idling in the EZ36D platform.

The Stock Legacy Thermal Degradation Problem

Due to the horizontal layout of the EZ36D boxer engine, factory coil boots and internal epoxy insulation sit in tight cylinder head recesses exposed to continuous heat soak. Over heat cycles, factory copper windings develop micro-fractures and the rubber boots succumb to corona discharge and dielectric breakdown. This results in voltage leakage, erratic idle, delayed throttle response, and incomplete fuel burn under load.

The Engineering Solution

This comprehensive ignition service kit features six upgraded coil-on-plug assemblies engineered with high-conductivity oxygen-free copper windings, thermoplastic housing, and heavy-duty silicone boots to resist thermal breakdown. Paired with fine-wire iridium spark plugs, the system lowers required firing voltage while providing a focused, high-temperature flame kernel for rapid flame propagation and stable combustion efficiency across the entire RPM band.

Technical Specifications

Compatibility

• 2010 Subaru Legacy 3.6R Sedan 4-Door (3.6L H6)
• 2010 Subaru Legacy 3.6R Premium Sedan 4-Door (3.6L H6)
• 2010 Subaru Legacy 3.6R Limited Sedan 4-Door (3.6L H6)
• 2011 Subaru Legacy 3.6R Sedan 4-Door (3.6L H6)
• 2011 Subaru Legacy 3.6R Premium Sedan 4-Door (3.6L H6)
• 2011 Subaru Legacy 3.6R Limited Sedan 4-Door (3.6L H6)

The Subaru Boxer Caliber Standard

Engineered to withstand the tight clearance constraints and lateral heat profiles of the naturally aspirated EZ36D, this kit maintains direct plug-and-play OE pin fitment without triggering false misfire codes or ECU adaptations.