back of pokemon card printable Google Search Pokemon cards, Pokemon Haltech Nexus S3 Plug 'n' Play Adapter Harness. 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. A simple Haltech Plug 'n' Play product that allows you to be up and running in just a few hours. The quick start guide will walk you through installation of the Haltech Plug 'n' Play adapter into your vehicle. Suits: Plug 'n' Play replacement of the factory ECU for Subaru WRX MY06 10 (Australian Domestic Market only). STI MY06 07 2. 5 Litre with DENSO ECU (Australian Domestic Market only). Notes: Not compatible with the Hitachi ECU.