The Invidia N1 downpipe for the Subaru WRX or STi offers strong boost in power, great horsepower gains, and offers a variety downpipe configurations to choose from. This Invidia downpipe is available in a catless bellmouth, catless divorced, and high flow cat equipped divorced design. Invidia's Downpipe for the WRX and STi features a large 4 inch stainless steel bellmouth to enhance power by freeing excess gases, and creating optimal flow and performance.

The Invidia divorced wastegate has a plate the protrudes into the turbo to separate exhaust flow coming out of the turbo to give reduce turbulence. This is good for stock and smaller turbochargers the protrusion does not work with some aftermarket turbos like APS turbo's for example.

The Invidia Bellmouth  has a wide open design that is better for larger turbochargers with more flow. It will work fine with a stock or small turbo, but it is designed for scenarios where wastegate turbulence is not an issue.

Invidia's catless downpipe will cause a Check Engine Light on. While this isn't harmful, it can be annoying and disables the cruise control. You can use a software solution such as the Cobb Accessport to eliminate these codes. The high flow catted downpipe is not emissions legal, and may still cause a CEL. The Invidia downpipe has a high flow cat that helps reduce boost spiking on the 2.5L motors. Invidia downpipe can be bolted up to any Invidia Exhaust or a stock exhaust for an easy installation.