If your state requires you to have catalytic converters to meet emissions for registration, we can accomodate you. These high flow catalytic converters are manufactured in house to the same specifications and high quality standards as the rest of our exhaust parts. They serve a dual purpose, making your cars emissions lower and quieting the exhaust. They connect a reversed stock or stock replacement shorty header to our 4 port sidepipe. We weld in oxygen sensor ports for easy installation. If you are switching a Mk1 or Mk2 from 1 port to 4 port sidepipes, or replacing your pipes, you will need these. For matching sidepipes, click here.
Applications: -All FFR Roadster and Challenge Series kits using 4 port sidepipes