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2008-2014 WRX / 2008+ STI Invidia Down Pipe w/High Flow Cat and Extra 02 Bung
For a strong boost in power, the Invidia Down Pipe offers an alternative to other power-boosting enhancements. To see just how much power the Invidia Downpipe can produce, a quick look at its dyno chart shows it easily added several horsepower to the stock exhaust system. Each Invidia Downpipe features a large 4" Stainless Steel bellmouth to enhance power by freeing excess gas. In addition, each Invidia Downpipe can be bolted up to any Invidia Exhaust or a stock exhaust for an easy installation.