09 Design FLASHlink Stage 01 – Ford Focus ST-Line Mk4
The 09 Design Stage 01 ECU calibration for the Ford Focus Mk4 ST-Line delivers a clear uplift in power and torque across the rev range. It sharpens throttle response, strengthens mid-range pull, and improves overall drivability without fuss.
Developed and validated by 09 Design through extensive road and track testing, this calibration is built for dependable, repeatable performance. It maintains OE-like manners in daily use while unlocking the engine’s potential.
Why choose Stage 01
- Strong, linear power with a broader torque band for easier overtakes.
- Smoother response and improved drivability in all conditions.
- Calibrated for reliability with factory-like refinement.
Fitment
Designed for Ford Focus Mk4 ST-Line models with manual or automatic transmission. Please use our vehicle lookup to confirm fitment, or see the Vehicle Fitment tab for full details.
Fuel and reliability
Works with a range of pump fuel octanes. For best results use premium unleaded. Every 09 Design calibration is monitored against key powertrain limits to protect engine and drivetrain components.
No hardware changes are required on a standard vehicle for Stage 01. Keep the car well serviced and in good mechanical health. Only install on a vehicle that is fault-free and up to date on maintenance.

