For maximum performance gains, HKS offers a direct bolt-on down pipe for turbo
applications. These HKS down pipes utilizes 65mm-75mm mandrel bent piping and
will bolt on to any stock turbo or HKS turbo upgrade kit. HKS down pipes were
specifically designed for off road use only and will provide maximum exhaust gas
flow and increased turbo spool up. Depending on the application, they are made
from either high quality coated stainless steel or polished SUS304 stainless
steel piping. HKS down pipes will mate to any cat-back exhaust system or stock
exhaust systems with a 3” flange.