The iE ProCore Downpipe takes your VW MK8 GTI, Golf R, or Audi 8Y S3 to a new level of menacing. The high-flow 200CPSI catalytic converter is generously sized to support any engine tune and hybrid turbochargers. Our specialty in-house engineered precious metal coating process produces an advanced CAT to align with ECU emissions requirements, so you can upgrade without the check engine light for a triple win: high-flow design, no CEL, and plenty of ruckus to be raised.