AIRTEC now brings you the 2.5″ big boost pipe kit with the larger 70mm cold side hose Please note: For Focus ST 225 – MUST Be fitted with 2.5″ outlets on intercooler. Stock ST is 2″. Will NOT fit Focus ST Stage 1/2 intercooler. WILL fit Focus ST Stage 3 intercooler. AIRTEC part no: ATMSFO55 From £330.00