Invidia Downpipe (all WRX and STI)

This very nice downpipe from Invidia features a CAST bell-mouth collector. It's available WITH a divider to separate the wastegate passage from the main exhaust passage to reduce turbulence at the turbo. Or, save money with a non-divided bell-mouth version.

In addition, the Invidia available with a high-flow catalytic converter so you can be nice to the environment, and pass visual and tailpipe emissions tests. Or, if you're just planning to drive your car at the track, there's a cat-free version.

Regardless of your choice, you'll be getting one of the nicest downpipes made, with beautiful machining on the front and back flanges, fully polished 3" stainless steel pipe, and smooth mandrel bends.

NOTE: Neither Mach V nor Invidia guarantees your cat against the flaming jets of fuel that can result if you run an open blow-off valve (BOV) or otherwise have some kind of over-rich condition. Downpipes damaged in this way will not be covered under warranty.

Note 2: Whenever you modify your factory catalytic converter, you may end up with a "catalytic converter efficiency" check engine light (CEL) code. Although you are less likely to have this code if you do have some kind of cat in the system, you may still get the code, even with a high-flow cat.

Either version bolts up to your stock cat-back, or most any cat-back that's designed to bolt up to a flat flange. Fits all 2002+ WRX and WRX STi.

Please read our FAQ page on catalytic converters before purchasing this part.