AIRTEC Motorsport Lower De-Res Pipe for Focus MK3 ST-DDesigned to increase airflow on the Focus MK3 ST-D as a replacement of the restrictive standard boost pipe, the AIRTEC Motorsport boost pipe creates a much smoother air flow by replacing the restrictive bends and smaller diameter pipe.Features:Swaged ends to prevent pipes working loose on bigger power cars.Will work perfectly with standard or re-mapped STs.To fit with both, stock and upgraded AIRTEC intercooler.Resonator delete.Fitting takes less than 30 minutes to install and fits to standard boost hoses.47mm pipe throughout.Available in Pro-Series Black.AIRTEC Part No: ATMSFO120