Nexus S2 Performance Package for MY99-00 WRX
The Nexus S2 Plug ‘n’ Play Adapter Kit for Subaru WRX MY99-00 offers a complete, high-tech engine management solution for the GC8 chassis. This kit bundles the compact yet powerful Haltech Nexus S2 VCU with the specific adapter harness required for the MY99-00 models. It is the ideal choice for enthusiasts who want the features of the Nexus platform (Wi-Fi, PDM functionality, Onboard Wideband) in a package sized for the street.
Engineering Deep-Dive: S2 Capabilities
The Nexus S2 is a 2-connector VCU that fits perfectly into the role of a standalone ECU for a 4-cylinder engine. It features Power Distribution capabilities, meaning you can wire high-current devices like fuel pumps directly to the unit, though this adapter focuses on integrating with the factory harness. The S2 includes an onboard wideband controller and a 4-bar MAP sensor, essential for tuning high-boost EJ20 engines accurately.
Operational Benefits: Modernized GC8
With this kit, the MY99 WRX gains features like launch control, flex-fuel support, and engine protection that far exceed the factory ECU’s capabilities. The Wi-Fi tuning allows for cable-free adjustments at the track. The installation is clean and reversible, preserving the classic chassis.
Fitment and Application Scope
Suits:
- Subaru WRX: MY99-00 (GC8).
- Transmission: Manual Transmission Only.
Technical Specifications
| Parameter | Specification |
|---|---|
| VCU Unit | Haltech Nexus S2 |
| Harness | Plug ‘n’ Play Adapter (HT-186335) |
| Onboard Features | Wideband, 4 Bar MAP, Wi-Fi |
| PDM | Basic PDM Functionality Supported |
Summary & Includes
The HT-212305 Kit brings 21st-century control to the 90s icon.
Includes:
- 1 x Haltech Nexus S2 VCU
- 1 x Plug ‘n’ Play Adaptor Harness
- 1 x M14 x 1.5 Air Temp Sensor
- 1 x Auxiliary I/O Plug & Pins
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