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Invidia 08-19 WRX/STI Down-Pipe w/ High Flow Cat

Invidia
INVHS08SW1DOCB
In stock
Downpipes
$1,428.00 $767.55
Subaru WRX downpipe enthusiasts, if you’re tired of that stock restriction killing your turbo’s personality, the...
$767.55

customers are viewing this product
Invidia 08-19 WRX/STI Down-Pipe w/ High Flow Cat

Subaru WRX downpipe enthusiasts, if you’re tired of that stock restriction killing your turbo’s personality, the Invidia High‑Flow Catted Down‑Pipe (08‑19 WRX/STI) gives you the airflow your build craves. It’s designed to let your turbo breathe, reduce backpressure, and unlock more mid‑to‑top end performance.

With 3‑inch mandrel‑bent 304 stainless steel piping, a 4‑inch bellmouth divorced wastegate flange, and a high‑flow catalytic converter, this Invidia downpipe balances performance and emissions. You keep the cat function while eliminating major bottlenecks, giving you responsiveness and a deeper exhaust tone.

The Invidia WRX downpipe is built for tuners and daily drivers alike. It includes an extra O2 sensor bung (for wideband), bolts into many existing cat‑back systems, and requires a tune to unlock its full potential. It’s for drivers who want serious gains without going full catless.


Features & Benefits

  • 3" mandrel‑bent stainless steel piping – ensures smooth, unrestricted flow through curves

  • High‑flow catalytic converter built in – maintains emissions while improving performance

  • 4" bellmouth + divorced wastegate flange – optimizes exhaust exit from turbo, reducing turbulence

  • 304 stainless steel construction – durable, corrosion resistant for long life

  • Extra O2 sensor bung – ready for wideband setups in tuning stages

  • Bolt‑on fitment for 2008–2019 WRX/STI – designed to integrate with many cat-back systems


Max Performance, Minimal Compromise

You’re not just buying another exhaust part—you’re upgrading how your engine exhales. This Subaru WRX downpipe unleashes hidden gains, sharpens throttle response, and gives your car a more aggressive growl. Whether you're on the street or the strip, you’ll notice the difference.


Specifications

Specification Detail
Part Number invHS08SW1DOCB
Vehicle Fitment 2008–2019 Subaru WRX / STI
Pipe Diameter 3.0 in (≈ 76 mm)
Catalytic Type High‑flow catalytic converter
Flange / Bellmouth Design 4" divorced wastegate bellmouth
Material 304 Stainless Steel
Sensor Bungs Factory O2 + extra for wideband
Installation Style Bolt-on, integrates with many cat-back systems

REVIEWS

RBN

Just installed this on my 2015 WRX in Boise, ID. The boost feels stronger, spool is crisper, and the tone is deeper without being unbearable.

Ryan B. N.

Boise, ID

★★★★★
MTS

My 2018 STI in Reno, NV feels more alive after this upgrade. No weird drone, power is more usable, and it's built tough.

Megan T. S.

Reno, NV

★★★★★
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Effective Date: October 2024
We offer a 30-day return policy, allowing you to request a return within 30 days of receiving your item. To qualify for a return, the item must be in its original condition—unused, with tags, and in its original packaging. A receipt or proof of purchase is also required.

To initiate a return, please contact us at info@riotparts.com. Returns must be shipped to the address provided upon request. If your return is approved, we will issue a return shipping label along with detailed instructions.

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For any return-related inquiries, please reach out to us at info@riotparts.com.

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The return shipping address will be determined based on the requestor’s location to ensure the nearest return facility is used.

Possible return locations include:
10880 Lear Blvd.
Reno, NV 89506, United States
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Arlington, TX 76017, United States
3035 Campus Dr.
Hatfield, PA 19440, United States
5789 N. Graham Road, Ste 200
Whiteland, IN 46184, United States
2020 NE Aloclek Dr 4711 N Lamon Ave
#118 STE 12, Hillsboro, OR 97124, United States

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• Electrical parts that have been installed or used
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