st-u je naziv duratec, al to je ustvari 2.0 zetec tunirani
The 170PS 2.0-litre Duratec ST engine has been developed from the standard 130PS 2.0-litre Ford Focus engine with several new features, including:
* New, high-flow aluminium cylinder head with larger inlet valves and higher lift intake and exhaust camshafts for higher peak rpm levels
* Continuously variable intake valve timing
* High compression, cast-aluminium pistons and forged steel connecting rods
* Dual mass flywheel
* New dual state intake (DSI) manifold, using long runners for low-end torque and shorter runners for higher peak power outputs
* Larger bore free-flowing stainless steel exhaust system, tuned for enhanced performance sound.
* A new, high-flow aluminium cylinder head with enlarged inlet ports, larger inlet valves and higher lift intake and exhaust camshafts for higher peak rpm levels
* Continuously variable intake valve timing
* A new dual-stage intake (DSI) manifold that uses long runners for low-end torque and shorter runners at higher revs for better peak power output
* A 65 mm large-bore, stainless steel tubular exhaust system with less restrictive catalytic converters.