Ignition Coil + Spark Plugs for Subaru Impreza (2000-2004) 2.5L

Direct-Fit Ignition Coil Pack and NGK Spark Plug Kit for 2000-2004 Subaru Impreza (GC/GD)

What it Does: The ignition coil pack and spark plug kit replaces aged factory ignition components on the 2000-2004 Subaru Impreza to eliminate engine misfires, restore lost combustion efficiency, and stabilize idle quality.

The Stock Subaru Impreza Thermal Breakdown Weakness

The factory intake-manifold-mounted waste-spark coil on the naturally aspirated EJ251 engine is constantly subjected to radiant engine heat and high-frequency boxer vibration. Over time, the original potting compound dries out, producing microscopic stress cracks in the housing. Moisture and heat penetrate the primary and secondary windings, causing dielectric breakdown, inter-cylinder arcing, and intermittent cylinder misfires (P0301-P0304) under wide-open throttle or wet weather conditions. Eroded standard copper electrodes simultaneously widen spark gaps, overworking aged coils until complete ignition failure occurs.

The Engineering Solution

This replacement kit pairs a heavy-duty 4-pole waste-spark coil block with pre-gapped NGK G-Power (7092) platinum spark plugs. The ignition coil is constructed with high-grade copper windings insulated by dense thermal-epoxy potting to resist cyclic heat soak and electrical leakage. Paired with NGK fine-wire 0.6mm platinum center electrodes, this combination requires significantly lower strike voltage to jump the gap. This lowers overall thermal load on the internal driver circuits, ensures rapid flame kernel propagation, and maintains crisp throttle response across the powerband.

Technical Specifications

Compatibility

• 2000-2001 Subaru Impreza 2.5 RS (GC6 Coupe / GM6 Sedan) 2.5L SOHC
• 2002-2004 Subaru Impreza 2.5 RS (GD6 Sedan) 2.5L SOHC
• 2002-2004 Subaru Impreza 2.5 TS (GG6 Sport Wagon) 2.5L SOHC
• 2000-2004 Subaru Impreza Outback Sport (GF6 / GG6 Wagon) 2.5L SOHC
• Fits non-turbo SOHC models only; does not fit turbo EJ205/EJ257 WRX or STI.

Frequently Asked Questions

Does this fit the GC and GD Impreza?

Yes, this is a direct fit for the 2000-2004 Subaru Impreza equipped with the EJ251 2.5L non-turbo SOHC engine.

Are spark plug wires included in this package?

No, this tune-up bundle includes one central waste-spark coil pack and four NGK platinum plugs; spark plug wires must be inspected and reused or purchased separately.

The Subaru Performance Caliber

Built to handle the harsh vibration and heat cycles unique to horizontally opposed boxer engines, this matched ignition setup delivers reliable cold starts, consistent spark energy, and clean combustion through every pull.