The stock downpipe found in the FK8 Civic Type-R has a restrictive catalytic converter. HKS aims to remove this restriction to significantly increase horsepower. The HKS downpipe does not have a catalytic converter, and also comes with a frontpipe that connects it to a cat-back exhaust.
- Removing catalytic converter results in a more linear boost and throttle response
- Uses 3 inch pipes, compatible with HKS catback exhausts
- A perfect addition to intake, intercooler and other HKS products for future ECU tuning and boostup
- Decreases secondary exhaust gas pressure from turbine and reduces exhaust restriction