Boost Pipe Kit - Cold Side for Airtec Intercooler - Swift Sport ZC33SBoost Pipe Kit Cold Side for Airtec Intercooler Swift Sport ZC33S Designed to work with The Airtec intercooler upgrade, this replaces the pipework from the intercooler to the throttle body for increased capacity to reduce restriction and improve response. The original pipework measures 50mm in diameter before stepping up to the 55m throttle body. Airtec's enlarged pipework measures 60mm to meet the intercooler outlet and then continues until it