This upgrade will allow you to purchase a VW mk4 1.8T 3" turbo-back with our K04 downpipe. The K03 downpipe is replaced with the K04 downpipe. Gasket and hardware changes are made as needed.
This upgrade CANNOT be purchased individually or after the purchase of our 3" turbo-back system. It MUST be purchased at the time of original purchase with our VW mk4 1.8T 3" turbo-back system. To discuss unique purchase options with our sales staff please contact us.