Ignition Coil + Spark Plugs for Subaru Impreza (1995-1996, 1998) 2.2L 2.5L

High-Output Ignition Coil and Spark Plug Kit for Subaru Impreza (GC/GF/GM)

What it Does: The ignition coil pack and spark plug kit restores secondary ignition voltage and uniform combustion across all cylinders on the Subaru Impreza to eliminate misfires and restore crisp throttle response.

The Stock Subaru Impreza Heat Soak and Dielectric Breakdown Problem

The factory wasted-spark coil pack on early naturally aspirated EJ22 and EJ25D boxer engines is mounted directly atop the intake manifold, subjecting it to intense thermal cycling. Over decades of service, engine bay heat embrittles the stock composite casing, generating micro-fractures in the potting epoxy. This leads to carbon tracking, secondary winding resistance drift, and high-voltage arc-out to ground under heavy load. Combined with aged, widened electrode gaps on high-mileage spark plugs, the compromised ignition energy induces hesitant tip-in response, rough idling, and unburnt fuel wash across the cylinder walls.

The Engineering Solution

Engineered as a direct bolt-in replacement, this ignition pack features reinforced thermoplastic construction and high-grade internal epoxy insulation to isolate secondary windings from engine heat and moisture ingress. Matched with four precisely gapped spark plugs engineered for thermal dissipation and arc stability, this package provides consistent peak kilovolt output across the horizontal-opposed layout. The balanced primary and secondary resistance preserves factory ECU dwell parameters while restoring flame kernel velocity and fuel efficiency under all manifold pressure conditions.

Technical Specifications

Compatibility

• 1995–1996 Subaru Impreza 2.2L H4 (EJ22E)
• 1998 Subaru Impreza 2.5L H4 (EJ25D DOHC)

Frequently Asked Questions

Does this fit the GC/GF Impreza?

Yes, this is a direct fit for the 1995–1996 and 1998 Subaru Impreza equipped with the EJ22 and EJ25 naturally aspirated boxer engines.

Are new spark plug wires required when installing this assembly?

While not mandatory, inspecting or renewing high-mileage ignition leads is strongly recommended to maintain low circuit resistance and protect the new coil pack.

The Subaru Performance Caliber

Tailored specifically for the distinct harmonics and firing sequence of the Subaru flat-four architecture, this assembly delivers instantaneous spark propagation to maximize boxer engine reliability, throttle precision, and power delivery.