Invidia Downpipe Catted Divorced Wastegate w/ 2 Bungs ( Part Number:INV HS08SW1DOC)

Invidia Downpipe Catted Divorced Wastegate w/ 2 Bungs

Manufacturer Part # HS08SW1DOC


MSRP: $793.00

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The Invidia Catted Downpipe features a Divorced Wastegate and cat, this will separate the exhaust gas exiting the downpipe, creating a smoother exhaust flow, thus resulting in more HP and Torque. All this while keeping the exhaust fumes clean and safe for the environment.

The downpipe is constructed of 304 stainless steel 3" mandrel bent tubing and bolts up to any stock replacement catback or stock unit. New Downpipe Gasket recommended for purchase with this downpipe.

This downpipe also has an extra oxygen sensor bung welded in so you can install a wideband oxygen sensor and keep the stock one intact. It comes with a plug installed so you don't have to worry about not having one.
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Brand: Invidia
Includes Catalytic Converter: Yes
Installation Hardware Included: Yes
Mouth Design: Divorced Wastegate
Piping Coating: No
Piping Flex Joint: No
Piping ID: 3.00in
Piping Material: 304 Stainless Steel
Piping Taper: No
Tuning Required: Yes

Mfgr. Warranty: 1 Year
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days

Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.


Verified Purchase

Love it
CMFR 17 days ago
Before getting this downpipe I had the N1 catback installed on my 11 WRX. The catback alone enhanced that nice rumble, but this downpipe brought that rumble a whole new level! Performance gains weren't all that I was hoping for, but they were still noticeable so no complaints there. I've had this downpipe on for just under 2 months now, and I still love it and get a smile on my face every time I start my car.
Verified Purchase

Happy Happy Happy
PeytHott 7 months ago
I ordered this Downpipe along with the N1 Dual Exit Exhaust to take my 2013 WRX Stage 2. Quality wise, it was beautiful straight out of the box. Way better looking and craftsmanship than the OEM downpipe. As far as installation I have access to a lift and we did the installation in around 2 hours. Removing the stock downpipe is difficult at times (removing the stock heat shield and removing turbo bolts), so you're going to need PB Blaster and a breaker bar. The new Downpipe bolted up easily and was a clean fit with the N1. I then flashed my car with the Cobb Stage 2+ OTS map and my car feels like a whole new machine. 5th gear has become a passing gear and the car pulls hard in 2nd and 3rd. EBCS and Pro-Tune are in the immediate future to get the car's full potential!
Verified Purchase

mason.merrill75769 1 year ago
I currently have this on my 09 WRX and going stage 2 was definitely worth it. Previous to installing this I had the invidia n1 catback and this greatly improved the sound and performance. I'd recommend this + the N1 + AccessPort.

Amazing is all i can say
Scooba steve 1 year ago
Got this downpipe today. Installed it in about 2 hours. The old downpipe is a pos so that was the longest part. Bolted up very nice installed the stage 2 ots map and the difference is night and day. Sounds amazing now so much better. A big step in speed and power. So satisfied with the quality of this product. If you are on the edge buy it you will not be disappointed.
Verified Purchase

Jj08wrx 2 years ago
Just hooked this baby up to my n1 catback running a ots Cobb stage 2 map incredible boost in power literally!!! 08 wrx

  • Q: installation  stiflow 9 months ago


    just wondering if there were any installation videos of this

    • A: I would refer to to help with install.

      Jared A. 9 months ago
  • Q: Fitting  AsapDayo 11 months ago


    Will this fit a 06 wrx with a vf39 swap?

    • A: No this is not for an 06 WRX. You will want INV HS05SW1DPC.

      Tyler G. 11 months ago
  • Q: Invidia Part#: INV HS08SW1DOC  Subie 11 months ago


    Have they confirmed the fitment for the 2016 Subaru WRX STI for this item, read many mixed reviews thanks.

    • A: This is confirmed fit for the 15+ STI.

      Jared A. 11 months ago
  • Q: Invida N1 fitment  Xavier 11 months ago


    I'll going to get the Invidia N1 catback dual exhaust for my 2013 WRX sedan 2.5l, will the be a good set up for it? And if so how much more HP will it give me?

    • A: Yes you can pair this up nicely with a N1 catback. With a proper tune, you could gain 10 or so horsepower.

      Chris W. 11 months ago
  • Q: SPT  cfoulk12 1 year ago


    what gasket would fit best to fit the spt catback ?

    • A: You would need a 3" downpipe to stock catback adapter (part: GRM 077044).

      Tyler G. 1 year ago
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