Invidia 08+ Subaru WRX/ 05-09 STI / 02 Legacy High Flow Downpipe w/ Cat and Extra 02 Bung

For a strong boost in power, the Invidia Down Pipe offers an alternative to other power-boosting enhancements. Each Invidia Downpipe features a large 4″ Stainless Steel bellmouth to enhance power by freeing excess gas. The Invidia Downpipe sports a one-piece design, eliminating the need for the stock catalytic converter. In addition, each Invidia Downpipe can be bolted up to any Invidia Exhaust or a stock exhaust for an easy installation.