Stage 1 for the Holden SRI Turbo involves reprogramming the factory ECU with the UNICHIP piggyback system.
The Astra Turbo 2lt 4 cylinder engine can be tuned using the UNICHIP Interceptor. The UNICHIP offers control over the engine timing, boost control and fuel maps that will allow gains in performance and fuel economy across the rev range. Expected gains are between 20 to 25 kW across the rev range.

The Stage 2 Kit for the Holden Astra SRI Turbo include the following components:

UNICHIP engine management system
2.5 inch Stainless Exhaust System

Expected gains are between 25 to 35kw depending on the vehicle model.