If you are using a factory harness and are after an easy ECU upgrade, take a look at Haltech Plug 'n' Play Adapter Kits. These adapters plug directly into your Haltech ECU and have a set of factory connectors on the other side which plug straight into the factory harness.

Suits:

• Plug 'n' Play replacement of the factory ECU for Subaru GDB WRX MY01-05 (All regions) & STI MY01-05 (JDM & Australian Delivered Only) EJ20 Non DBW with manual transmission only.

Includes:

• Injection molded plastic plug 'n' play adaptor harness, M14 x 1.5 air temp sensor with matching plug and pins, auxiliary I/O 16 Pin Tyco plug and pins.

Features:

• This harness when installed in conjunction with a Haltech Elite ECU opens the door to virtually limitless performance modification and tuning of your vehicle.
• Fully programmable systems allow you to extract all the performance from your engine by delivering precisely the required amount of fuel and ignition timing that your engine requires for maximum output under all operating conditions.

Fitment:

• Subaru GDB WRX MY 2001-2005 Manual Transmission Only.