2004–2006 Subaru STi Intake Manifold Harness (Engine Harness)

$749.99 $799.99

SKU: PR-BTHR008-0

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Estimated delivery: First week of December 2026.

Give Your 2004-2006 STi, 2004-2006 Baja Turbo, or 2004-2005 Forester Turbo Engine Bay a Fresh Start.

Your Subaru still has plenty of miles and memories ahead of it. But after two decades of engine-bay heat, vibration, and previous repairs, the wiring under the intake manifold may be showing its age.

Cracking tape, deteriorating sleeving, damaged connectors, and mystery splices aren't what you want to find when you're building a car you love. Whether you're refreshing a longtime favorite or bringing an engine bay back to life, iWire's replacement intake manifold harness gives you a fresh starting point instead of another round of patchwork repairs.

Images are representative of the product\'s construction. Actual 2004–2006 STI harness photos will be added when available.

Spend Less Time Dealing With Old Wiring.

Replace an aging harness. Retire deteriorating tape, sleeving, and worn wiring that's been through years of engine-bay conditions.
Move on from past repairs. A replacement harness is a cleaner alternative to continuing to patch a cut or damaged original.
Not just an OEM Replacement. We didn't just replicate the OEM part; we used upgraded materials and tweaked the routing for a cleaner-looking setup than the factory.

Vehicle Compatibility

2004–2006 Subaru STi (USDM EJ257)
2004–2006 Subaru Baja Turbo (EJ255)
2004–2005 Subaru Forester Turbo (EJ255)

PRODUCT WARNING:
This kit is designed to modify the electrical systems in your vehicle. Working around electricity can be dangerous and even deadly if proper care is not taken. While iWire takes pride in making our products as simple as possible to use, we still recommend that a professional, qualified technician perform the installation. Any modification to a vehicle that exceeds the original manufacturer specifications carries an inherent risk of mechanical failure that could result in damage to life or property. iWire is not responsible or liable for any damages that may occur. THIS PRODUCT IS NON-RETURNABLE. By purchasing this product, you agree to these terms of sale.