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| Invidia Catless and Catted Downpipes for 02-09 WRX & 04-09 STi
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| Invidia downpipes for the 2002-2009 Subaru WRX & STi are designed in a variety of configurations. Every Invidia WRX & STi downpipe features 3" diameter stainless steel piping, thick flanges, and a cast upper section for optimal flow and performance. This downpipe is available in a catless bellmouth, catless divorced, and high-flow cat equipped divorced design. |
 | Divorced vs. Bellmouth:
Divorced: A divorced wastegate downpipe 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 (i.e APS).
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Bellmouth: This design has a wide-open bell at the turbo, which 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.
The diagram to the right is a stock WRX turbo, so you can see how the turbocharger interacts with the Bellmouth and Divorced Invidia downpipe designs. |
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Invidia's catless downpipe will cause a Check Engine Light (CEL) on your WRX or STi. 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 or try a mechanical fix (O2 sensor spacer). The high-flow cat Invidia WRX & STi downpipe is not emissions legal, and may still cause a CEL. The high flow cat helps to reduce boost spiking on 2.5L cars.
Shipping costs are calculated upon checkout. |
| NOTE: Downpipes vary between model and year. Choose the correct downpipe for your car below. |
| FITMENT: 2002-2009 Subaru WRX & 2004-2009 Subaru STi |
| Description |
Part #: |
MSRP: |
Price: |
Inventory |
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High Flow Cat Downpipe
Divorced Wastegate
2002-2007 WRX
2004-2007 STi |
HS05SW1DPC |
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High Flow Cat Downpipe
Divorced Wastegate
2008-2009 WRX
2008-2009 STi |
HS08SW1DPC |
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Catless Downpipe
Divorced Wastegate
2002-2007 WRX
2004-2007 STi |
HS05SW1DPN |
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Catless Downpipe
Divorced Wastegate
2008-2009 WRX
2008-2009 STi |
HS08SW1DPN |
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Catless Downpipe
Bellmouth
2002-2007 WRX
2004-2007 STi |
HS02SW1DPN |
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