Coil On Plug Conversion Loom – WRX GC8 (1997 - 1998) | Roo Racing

Bring your late-90s GC8 ignition system firmly into the modern era. The factory waste-spark ignition system and external ignitor module on the 1997–1998 WRX (EJ20G/EJ20K) were great in their day, but after nearly three decades of engine bay heat, they are prone to degradation, spark blow-out under boost, and annoying misfires.

The Roo Racing Coil-On-Plug (COP) Conversion Loom allows you to delete the outdated factory coil pack and external ignitor, converting your machine to a modern individual coil-on-plug setup. By giving each cylinder its own dedicated coil, you get a significantly stronger, more stable, and highly consistent spark delivery which is essential for track-driven cars or anyone turning up the boost.

Unlike later models, the '97-'98 platform requires a proper mechanical solution to bypass the factory ignitor. This kit features a high-quality wiring harness and dedicated bridging cables designed to neatly integrate into your factory setup, giving you a clean, reliable, and motorsport-grade ignition system that is built to last.

What This Kit Does:

• Converts to Modern COP: Upgrades the factory waste-spark system to individual coils per cylinder.

• Deletes the Weak Links: Eliminates the aging OEM coil pack and troublesome external ignitor module.

• Stabilizes Your Spark: Delivers a stronger, more consistent spark across the rev range to eliminate high-boost misfires.

• Simplifies the Engine Bay: Cleans up old wiring clutter and makes future ignition servicing a breeze.

Key Features:

• Premium Quality Components: Built using high-spec, motorsport-grade wiring and specialized automotive connectors.

• Engineered for Performance: Designed specifically to adapt modern COP coils with built-in igniters to the '97-'98 platform.

• Locally Assembled: Built by crew who understand the platform and tested for maximum reliability.

Vehicle Fitment:

• Subaru Impreza WRX GC8 (Chassis years: 1997 – 1998)

• Engine codes: EJ20G / EJ20K equipped with factory offset coil pack and external ignitor module.

Kit Includes:

• Roo Racing Coil-On-Plug Main Conversion Loom

• Ignitor Module Bridging Cables

• Detailed Step-by-Step Installation Instructions

🛠️ Installation Note: Read Before You Install

Please note that due to the factory wiring layout of the 1997–1998 model years, this kit is not a 100% plug-and-play install. To successfully bypass the factory ignitor module, the included bridging cables must be soldered or crimped directly into the engine’s factory ignition loom. If you aren't comfortable with automotive electrical work or proper crimping/soldering techniques, we highly recommend having this kit fitted by a professional automotive electrician or a specialized workshop.

🦘 Roo Racing Tip

While you're updating the loom, don't leave old components in the mix! For the absolute best results, install this kit alongside a fresh set of modern coil packs and brand-new spark plugs gapped to your engine's spec. A premium wiring harness can't fix tired, worn-out hardware.

This conversion isn’t about chasing abstract horsepower numbers on a dyno sheet. It’s about securing crisp spark, rock-solid ignition reliability, and modern drivability for your classic WRX.

🦘 Roo Racing Promise: We only design and stock what we’d trust in our own builds. Quality Subaru parts, engineered right, and backed by people who live and breathe the platform.